MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 11

1. ASCII is ________ bit code
a. 6 b. 7 c. 9 d. 5 1
2. The diagrammatic representation of Algorithm is called______ 1
3. Pick the odd one out
a. goto b. return c. break d. continue 1
4. The output of 5%2 will be ________ 1
5. Give the output of
a. cout<<sizeof(double);
b. cout<<sizeof(short); 2
6. Assuming that variable ‘res ‘starts with value 25,What will be the following
code fragment prints out
a. cout<<res--;
b. cout>>++res; 2
7. Differentiate between ‘=’ and’= =’ 2
8. Match the following
a. 1024 byte Search Engine
b. Norton Browser
c. Google Antivirus
d. Mozilla 1KB
1MB 2
9. Computers are considered as slaves and human beings are their masters.
Justify statement 2
10. Categorize the following tokens
a. cout b. && c. sum d. void 2
11. Identify errors in the following program code
include<iostream.h>
Void main()
{
int a:
chr name(10);
cout<<”Enter number”;
cin<<a;
} 2
12. Using while loop rewrite following code segment
for(int j=1,sum=0;j<=10;j=j+1)
sum+=j; 2
13. There are three programs written in BASIC,C++,Assembly Lang
a. List out language processors needed 2
b. Write differences in Language translation 2
14. List any four different categories of software packages with an example for
each 3
15. Rewrite the following statement into a single statement using conditional
operator
if(a>b)
{
if(a>c)
big=a;
else
big=c;
}
else
{
if(b>c)
big=b;
else
big=c;
} 3
16. Breifly explain the working and usage of MICR and OMR
OR
17. Not all primary memories are volatile.Justify 3
18. Fill up the missing digits
a. (8A)16=(______1010)2
b. (__6__)8=(101___010)2 3
19. Name the header files where following functions are defined
a. setw() b. exp() c. atoi() d. strcmp() e. isalpha() f. sin() 3
20. Suppose you want to send a letter to your friend over internet.Explain
different steps for it 3
21. You are trying to interconnect the computers in the lab.
a. Which topology you will prefer.Justify 3
b. Identify supporting devices 1
22. Compare CRT with Flat Panel Dispalys 4
23. Customers are waiting infront of a cash counter to pay the telephone
bills.Name the data structure which is suitable while computerizing
payment of bills.Write the operation performed for this system
24. Consider a stack of plates as an array .Use separate algorithm to perform
operation on the stack 5
25. Write an algorithm to perform binary search on an array

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 10

1. Define data and information with example? Score 3
2. What are the characteristics of the computer? Score 3
3. How can you improve the quality of Information? Score 3
4. Name the components of electronic equipments that are used for data processing?
Score 3
5. The computers make use of some major components during the data processing
operation .Explain the purpose of each. Score 4
6. Briefly explains different number system? Score 3
7. Convert the following number into the equivalent number systems. Score 3
(8888)10 = (………..)2 = (………..)8 = (………..)16
8. Most of the leading banks accept only MICR cheques. What is its specialty? Give the
advantages of using MICR. Score 3
9. Include each of the following numbers into all possible number systems
123, 569, 1101 Score 3
10. List all the printers in which carbon copies can be taken. Score 2
11. Mention some of the qualities of Information? Score 2
12. Write down the MSB and LSB of the following number
(11010.01111)2 Score 2
13. Briefly explains
a) RAM b) PROM c)EPROM d)EEPROM Score 4
15) Write briefly on any of the two input devices? Score 2

16. Explain the organization of a computer? How does the various units interact with
each other? Score 4

17. How can we use computers in the field of Communication? Score 2
18. Compare CRT and LCD based on principle of development of an image?
Score 2
Section –B
19. Explain Binary Representation of Integers? Score 5
20. What is data processing? Explain the basic data processing activities
21. Convert the following numbers to their binary equivalent
a. (2AC) 16 b. (F23) 16 c. (173)8
d. (235)8 e. (398)10 f. (783)10 Score 4

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 9

1. In a C++ program Johny wrote the statement ‘float salary’. He wants to know how many bytes the
variable ‘salary’ will take. Name the operator he can use. (Score 1)
2. a)Classify the following operators into different categories.
<<, %, <, +, /, &&, ++, !=, ! (Score 2)
b) 6AE5, 6AE3, 6AE1, ……., ……… (Fill the missing term) (Score 1)
3. Pick the odd one out
a) Dot Matrix Printer b)Inkjet Printer c) Daisy Wheel Printer d) Drum Printer (Score 1)
4. The Single Window System for plus one admission collects data from the applicants
through a form. These details in this application form are used to prepare allotment list.
a) Write down the data and information in this context. (Score 1)
b) If an applicant fails to give options of schools and groups for his/her admission, which utility
factor of information will be affected? Give reason for your opinion. (Score 2)
5. a)Let ‘Amount’ is an array. Write the c++ statement to access the 10th element of the array
(Score 1)
b)Rewrite the following statement using if statement.
Big=A>B?A:B; (Score 2)
c)Predict the output of the following
int a = 10,b;
b = a++ + ++a + ++a; (Score 1)
6.a) Categorize the following hardware and software. (Score 1)
Driver, Mouse, Translators, OMR, Light Pen, CPU, Utilities, Operating System
b) Add three more items in each category. (Score 2)
7. Analyse the following cases and write down the most suitable memory devices for each.
a) A small sized biodata file saved in the computer is to be taken outside for printing. (Score 1)
b)Very large data capacity compact and usually not portable. (Score 1)
8. Explain the different types of errors that occur in a program. (score 3)
9. a)Categorise the following I/O functions and write the speciality of each category. (score 3)
Getchar(), puts(), getch(), getline(), putchar(), gets(), read(), write(), get(), put()
b)If (54)x = (124)y,then (41)x = (……….)y. (Score 2)
10. Diagram of one of the phases in programming is given below
Source code ? Object code
a) Nme the phase (Score 1)
b) What can be used in place of ‘?’ in the above diagram? Explain. (Score 2)
11. Categorize the various tokens present in the following code
Void main()
{
int k;
float p;
k = 15;
p = k/2.0;
cout<<p;
} (Score 2)
12. Rewrite the following code using while loop
for(count =10;count<=50;cont++)
{
cout<<count;
cout<<endl;
} (Score 2)
13. Some real life situation are given below. Correlate these with a data structure / operation.
a) Combining Malayalam students of Commerce batch and Science batch.
b)Give 2 bonus marks for each student in the class.
c) Preparing a rank list based on the mark of student.
d) Take one plate from a bundle of plates. (Score 2)
14. Find out the errors in the program and correct it. (Score 2)
#include<streamio.h>
String main
{
int a, b, c;
clrscr();
cout>>a>>b
a + b =c
return
15. Write down the prototype for the following.
a) Function ‘triangle’ that 3 floating point argument a, b and c and return a floating point result.
(Score1)
b) Function’arr’ will take 3 integers and does not return any thing. (Score1)
c) Function ‘Sum’ will not take any argument and return an integer as result. (Score1)
16. Consider the following code
for(int i=10;i<20;i++)
{
if(i===15)
break;
cout<<i<<” “;
}
a) What will be the output of the above code? (Score 2)
b) Predict the output when ‘break’ is replaced by ‘continue’ (Score 2)
17. a)How can you represent various languages in computer? Explain the code used for this purpose.
(Score 1)
b)Classify computer networks based on geographical area and physical arrangement. Explain any
two from each of the classification category with its merit and demerit. (Score 3)
18. Explain the term function recursion with an example. (Score 3)
19. Suppose you want to know whether a particular item is included in a list.
a)Which methods can be used for this? (Score1)
b) Write down the program for the efficient method. (Score 4)
20. The rate of income tax on salary is shown below. Write a c++ program to calculate the tax.
(score 5)
Salary Tax Rate
Below Rs. 100000 No Tax
150000 – 160000 10%
160000 – 200000 20%
Above 200000 30%
21. You are standing in a row to remit electricity bill.
a)Which data structure can be compared with this? (Score 1)
b) Write an algorithm to add and remove a person to that row. (Score 4)

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 8

1. Computers are more capable than human beings. List and explain any four arguments
supporting this statement. (2)
2. A student put his plus 1 application form just after the last date. Here which utility of
information is missed. What are the other utilities ? (3)
3. Fill up the missing numbers
(D‐‐‐‐‐‐‐)16 = (‐‐‐‐‐‐‐1000)2 (1)
(‐‐‐‐‐‐‐ 6 ‐‐‐‐‐‐‐‐) 8 = (101‐‐‐‐‐‐‐100)2 (1)
4. Represent in 2’s complement form
a) ‐89
b) ‐32 (3)
5. Find the decimal equivalent of the following
a) 72.18 b) 123.2616 (3)
6. Name the input device used for playing games. (1)
7. Explain the speciality of function keys in a keyboard (2)
8. Compare CRT and flat panel display. (3)
9. Compare key board and mouse (3)
10. Explain any two non impact printer and explain. (3)
11. What is ROM ? Explain different types of ROM. (3)
12. Seek time+ Latency time+Transfer time=‐‐‐‐‐‐‐‐‐‐‐‐‐ (1)
13. Computers are connected in many ways in a network . Explain the various types
of arrangement of computers as a network . Draw the block diagram and write features (3)
of each.
14. Differentiate compiler and interpreter. (2)
15. What are the limitations of flowchart and draw the flowchart symbols. (3)
16. Write an algorithm to find the sum of first N natural numbers. (3)
17. Identify the errors if any and correct them.
Void main[]
{
Int a,b;
Cin<<a<<b;
Cout>>a>>b; (2)
)
18. If a=2 , b=3 and c= ++a + b++ then the value of c will be ‐‐‐‐‐‐ (1)
19. Following are some data items. Suggest suitable datatypes in c++ for storing it
Explain each data type by listing its features.
a. 10000 b. 5.24 c. ‘A’ d. 2157367 (2)
20. Match the following
a. Loop statement i. continue
b. Jump statement ii. Do—while
c. Decision statement iii. { a=0; }
d. Compound statement iv. Putchar
v. if (2)
21. Rewrite the following statement using ‘ if ‘statement
Large=a>b ? a : b ; (1)
22. ABC wrote a computer program. While compiling and running he saw many errors .
a. Identify the name given to the process of removing the errors. (1)
b. Briefly explain the type of errors. (3)
23. Write a program to get the following output
1
1 2
1 2 3
1 2 3 4 (4)
24. Write the algorithm for binary search and linear search (4)
25. Identify the odd one from the following.
a. break b. goto c. switch d. continue (1)
26. Distinguish between local and global variables (2)
27. Name the Header file to which following built in function belong to
a. sqrt() b. setw() c. getch() d. strcat() (2)
28. Distinguish between the following functions
a. islower and tolower (1)
b. isupper and toupper (1)

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 7

1.'Computers have no Iq of their own'. Explain 1
2.Complete the series100, 110, 1000,______, ______ 1
3.Which device help you to input a photo graph into a computer? 1
4. ____________is the device used for connecting node to a network 1
5. Re-write the given statement using conditonal operator
if(a > b)
print a
else
print b 1
6. _________statement returns the control to the beginning of the program 1
7. If a=c/(d-e)name the error generated when value of both d and e is 5 1
8. Name the library function used to find the length of a string 1
9. Data processing is a series of operations that convert data into useful informaton.
Explain this with the help of a real life situation. 2
10. Compare CRT monitor and LCD monitor 2
11. You have a computer at home and wants to take an internet connection in your home.
What are the software and hardware required. 2
12. Suppose your friend copies software without permission. Is it a crime?
Justify your answer. 2
13 a)Group the following into
i) key word ii) identifier iii) literal iv) punctuator v) operator
'd', int, my_name, switch, ram , \t , +=, ; 2
b) What is the significance escape sequence? What is the escape sequence used
for null character 2
14. Write a program to find the sum of digits of a number using
a) Entry controlled loop 2
b) exit contro loop 2
15. Compare write() and getline() functions 2
16. Differentiate between LIFO and FIFO 3
17. a)Explain different type of errors that occur in a program 3
b)Explain different methods for giving comments in a C++ program 2
18. a) Explain different types of language processors 3
b) How RAM is differ from ROM 3
19. a)Compare switch and if.......else if ladder 3
b)Explain jump statements available in C++ 3
20. Write a program to find the reverse of a string 3
21. a) Explain Binary Search 2
b) Compare it with linear search 1
c)Write a C++ Program to do binary seach on a sorted array 3
d) write an algorith for linear search 3
e) Write C++ program to do linear seach in an array of give size 3
22. a)Differentiate call by value method and call by refrence method using an example 2
b) Write a C++ function to check a given number is prime or not 3
23. What is recursion? Write a recursive function to find the factorial of a given number. 5

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 6

1. ……………. is required for reading bank cheques. (Score 1)
2. …………….. Bits are required for represent a character in ASCII code . (Score 1)
3. …………….. utility is used to create free space in secondary storage devices. (Score 1)
4. Divide by zero is a …………… error.
5. Ramu wants to input three variable using a single C++ statement. Can you help him. (Score 1)
6.clrscr() function is used to ………….. (Score 1)
7. Shyam wants to use some mathematical functions in his program. How can he do this
without adding code of his own. (Score 1)
8. Ram has used a integer variable MARK in his program . How can he find the number of
bytes required to store it. ( Score 1)
9. Vinay got information about his train after it left the station . Which utility of information
is badly affected here . (Score 1)
10. Complete the series
1011,1101,1111,……… , ……… ( In binary)
11.“Input device like joystick and trackball are popular among children “ Comment.(Score 2)
12. A cable operator neat your home uses a popular topology to give new connections . Can
you name and explain its advantages . (Score 2)
13. “ A student copied his friend’s lab programs without his consent “ Which problem related
to software is discussed here. (Score 2)
14. Every language has its character set. Can you explain the character set of C++ language.
(Score 2)
15. “ Arrays are considered a derived data type“ Comment (Score 2)
16. We can transfer program control to anywhere in a program . Do you support this
statement. If yes explain (Score 2)
17.”The functions strcmp and strcmpi nearly are the same “ Comment (Score 3)
18. Can we find whether a user has inputted a digit ? If yes name the function and the header
file associated with it . (Score 3)
19.Everyone can see details displayed on a notice board but not authorized see what is
written in a cash register . Can you connect the above statement with variables used in
C++ language . (Score 3)
20. “ Binary search is faster and better than linear search in some occasions “ Comment with
appropriate examples. (Score 3)
21. Suggest some stylistics guidelines for writing programs . (Score 3)
22. Write a program in C++ for the following output.
1
1 2
1 2 3
1 2 3 4
23. Write a program segment to store and display your name using arrays . (Score 3)
24. Create a simple calculator using switch statement (Score 3)
25. While solving problems using computers we come across many phases . Explain them.
(Score 5)

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 5

1. In c++ ----------------------is used as a statement terminator. (score 1)
2. The preprocessor directive #include<iostream.h> is required if
(i) console output is used (ii) console input is used
(iii) Both console input and output is used (iv) none of the above (score 1)
3 Pick up the binary number from the following
(i) 1234 (ii)5AC (iii) 523 (iv) none of these (score 1)
4 Floppy disks are available in the size of
(i) 8” (ii) 5.25” (iii) 3.5” (iv)All of the above (score 1)
5. Pick out the output device from the following
(i) Optical scanner (ii) CRT (iii) voice recognition (iv) All of the above (score 1)
6. A computer program is (score 1)
(i) an algorithm (ii) a complete flowchart (iii) algorithm written in computer language

7.Explain the working of the following c++ statement. (score 2)
putch ( getch ( ) );

8. Computers are part of the way we live. Justify (score 3)
9. Pick up the invalid identifier from the following. Give reasons for the invalidity
(1)@rld3 (2) HNO3 (3)_noon (4) 2ab (score 2)
10. Consider your school library. List out the different data processing activities and
connect them in the context of library (score 3)
11. Write out the binary coding of the word ‘PENCIL’ in ASCII 7. How many bytes are
required for the representation. (score 2)
12. Write an algorithm to find the area and perimeter of a circle. (score 4)
13. Arrange the following in correct sequence
Documentation—Testing—Debugging—Problem Identification—Program writing—
Algorithm Development (score 3)
14 Write a c++ program to get the following output. (score 5)
*
* *
* * *
* * * *
* * * *
15. What type of network is required for each of the following situations. (score 3)
(1) A bank need to interconnect all its branches across the city
(2) All district headquarters in this state are to be connected by a network
(3) A university wants to build a computer network in the campus.
16. What is e-mail. Name any two websites that provide free e-mail services. (score 2)
17 main ( )
{ (score 1)
int p, q;
cout<<”enter the integers”;
cin>>p>>q;
if(p<q) cout<<p<<endl;
else
cout<<q<<endl;
Pick up the correct statement from the following.
(i) Program is used to find the maximum of two integers.
(ii) Program is used to find the minimum of two integers.
(iii) Program is used to ascertain the equality of two integers
(iv) Program is used to find the remainder
18. Explain different types of errors (score 3)
19. In a CD pack CDs are placed one over the other through a central axis. Assume that
there are 50 CDs in the pack. (score 5)
(i) Name the data structure that resembles with the CD pack.
(ii) Consider the CD pack as an array in c++, how will you name the position of the last
CD and what will be its value.
(iii) Write an algorithm to remove a CD from the pack and name the operations
performed
20. Write a C++ program to print Fibonacci series using recursive function (score 4)
21. What is the length of the string “MALAYALAM” . How much memory is required
to store the string. (score 2)
22. Searching for a word in a dictionary resembles with an array operation with a specific
method (score 4)
(i) Name the operation and method.
(ii) Write the algorithm to perform this.
(iii) Specify the prerequisites for this kind of search.
23. Read the following code segment (score 2)
Char name[30];
Cin>> name;
Cout<<name;
(i) If the input is “Devi Priya”, the output will be only “Devi”. Why does this
happens?
(ii) How can you make the output as “Devi Priya”.

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 1

1. Kishor forget to apply for the online job before the last date of applying. …….utility
of information fails in this regard. (1 Score)
2. “It is better to computerize the Public Library”. Suggest your view points in this
comment on behalf of EDP and MDP. (2 Score)
3. a) (734)10 = (x)4 = (y)6. Find x and y (2 Score)
b) Complete the series (233)8,(235)8,(240)8, ……., ……… (2 Score)
c) (11001)2 – (……..)2 =(1011) 2. Find missing term. (1 Score)
4. Choose the most suitable I/O device from the list
Thermal Printer, Light pen, OMR, Inkjet printer, Scanner, MICR for the following
situations. (2 Score)
i) A person wants to place his father’s photograph as the desktop wallpaper of his
computer.
ii) Quick processing of DDs and cheques in banks.
iii) Printing tickets in KSRTC buses.
iv) Evaluation of answer scripts in PSC and Entrance examinations.
5.a) How images are shown in LCD displays.
b)Describe the working of Ink Jet printer.
6.a) Compare RAM and ROM.
 (2 Score)
b)Discuss the advantages & characteristics of Hard Disc.
7. Yours friend request your help for arranging computers in his office as a network.
What are the minimum requirements that you will ask for networking. (2 Score)
8. Differentiate the below two strings in terms of network terminologies. Also specify
each terms.
xyz@yahoo.co.in
http://www.mypage.com/index.html
9. Arrange various steps in programming given below in their correct order. (1 Score)
Execution & Testing, Problem Identification, Debugging, Documentation,
Translation.
10. Drow the flow chart to print the series 1,1,2,3,5,8,13, ……….. up to N terms.
(2 Score)

11. Distinguish the terms debugging and translation. (2 Score)
12. Arrange the below C++ tokens into five different groups. (2 Score)
price, double, avg_mark, +, else,:?,<=,”age”,123, ; , --,[ ]
13. Rewrite the following code using another statement in C++ (without using ‘if’)
if (a%2 = = 0) (2 Score)
cout<<”Even”;
else
cout<<”Odd”;
14. a) Differentiate break; and continue; statements. (2 Score)
b)Predict the output for following code by tracing the loop (2 Score)
int a=0,c=0;
while(a<10)
{
a + =1;
if(a= =5 || a= =6 || a= =7)
continue;
c++;
} cout<<c;
15. Predict the output of below C++ codes if initially a=10, b=3, c=4 all integer variables.
a++; (2 Score)
x=a%b+4;
y=x+++c;
cout<<x; cout<<y;
16. Match the following variables and datatypes. (2 Score)
variables for storing
a) age of human being i) float
b) price of stationary item ii) character array
c) name of employee iii) unsigned int
d) Distance between earth and moon iv) long double
v) short.
17. Write a program in C++ to accept a character from keyboard and change its Case.
(Upper case to Lower case and vice versa)
Or (4 Score)
Write a C++ program to print the pattern as shown below.
1 2 3 4
1 2 3
1 2
1

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET  4

1. Given the following code fragment

int main()

{

float sum(float,float);

…

…

}

void calc(void)

{

float x, y, z;

cin>>x>>y;

s = sum (x,y);

}

Will the above given function work? If not why? Score 3

OR

2. Write a complete C++ program that reads a float array having 10 elements. The

program uses function to reverse this array. Score 3

3. Searching for a word in dictionary resembles with an array operation with a specific

method.

(a) Name the operation and method. Score 1

(b) Write the algorithm to perform this. Score 3

(c) specify the prerequisites for this kind of search Score 1

4. The names of students in a class are stored in an array of strings. Write a program

program to prepare alphabetically sorted listings of names. Score 5

5. When structures are passed to function as argument it should be declared

……................ Score 1

6. Rajeev wants to convert a string to an integer and Raju wants to convert a long to a

string . Which built in function can be used for these purposes and give the name (s ) of

header file ( s ) which contain the prototypes of these functions ? Score 2

7. Arrange the following operators according to the increasing order of precedence.

?: , <= , ++ , || , + , * , >= , && Score 2

8. Match the following. Score 2

A B

1. CPU a. MHz

2. HDD b. KBPS

3. Floppy c. GB

4. Printer d. 1.44 MB

e. CPS

9. Arun wants to convert the word DEAD to equivalent octal and Varun wants to convert

the octal number 7156 to equivalent hexadecimal number . Please help him. Score 2

10. Sutract 1110002 from 10111002 using 2’s complement method. Score 3

11. Now a days in newspapers, facilities are provided to include the news items which

come after all its pages are set and still can publish it in time. But it was not possible until

a few years back. Why? Score 3

12. Convert the following number into equivalent number systems.

(776)10 = (…….)4 = (…….)8 = (…….)7 Score 2

13. Name the following : Score 2

( a ) A program used to view information on the internet .

( b ) A folder that contains the received e_mail messages .

( c ) Example for a website that provides free e_mail service .

( d ) The device used to connect a computer to a network .

14 . Which protocol is used to deliver e_mail within internet ? Score 1

15. Briefly explain DNS . Score 2

16. If the principal asks you for your suggestion about buying a printer what will be your

opinion ? Why ? Score 3

17. What will be the result of a = 5/3 if a is ( a ) float ( b ) int Score 2

18. Evaluate a+ = a++ + ++a ; if a = 20 initially . Score 2

19. Which are the two ways to connect your computer to the internet ? Score 3

20. If your computer teacher asks you to write a computer program , what are the

activities to be performed by you for writing the the same ? Score 5

21. Explain different types of expressions and different methods of type conversions in

C++ . Score 5

22. A for loop statement is given below :

for ( int s = 0 ; n>0 ; s+ = n%10 , n/ = 10 ) ;

( a ) What will be the value of s after the execution of this loop , if the value of n is 456 ?

Give explanation of your answer . Score 2

( b ) Convert the above code segment using do-while loop Score 3

23. In a CD pack the CDs are placed one over the other through a central axis. Asume

that there are 25 CDs in the pack.

(a) Name the data structure that resembles with the CD pack. Score 1

(b) Considering the CD pack as an array, how will you name the position of the last CD

and what will be its value? Score 1

(c) Write an algorithm to remove a CD from the pack and name the operation

performed. Score 3

24. While waiting for ticket at the railway station ticket counter, you are following the

principle as that of a data structure.

(a) Name the data structure and the principle. Score 1

(b) Write an algorithm to add a new element in this data structure. Score 3

(c) Name the situation there is no space for adding the new element. Score 1

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 3

1.Pick the odd man out
a)Bus b)Ring c)Lan d)Star
2.Write the purpose of the following key combinations in c++ IDE
a)Alt +F5 b)Ctrl+F9
3.Consider the following c++ statements
Char ch=’A’;
Putchar(++ch);
What will be the output?
4.State true or false
Hard copy devices are very slow compared to soft copy devices
5.Somebody copies a software without author’s legal permission.Do you think it is
a crime? Why?Express your comments
6.What would be the appropriate data type to store the following?
1)Length of cloths
2)Age of employee
3)Average mark of a student
4)Name of the student
7.Find and correct the errors, if any in any of the following statements
1)cout<<”x =”;x;
2)cin>>x;>>y;
8.Match the following
a)Loop statements                 Continue
b)Jump statements                 do…..while
c)Decision statements            { a=0;}
d)Compound statements        putchar
                                             if
9)Write the corrected version of the program and find the output
#include(iostream.h)
void main( )
{
float return=10.7;
float y;
y=return % 5.0;
cout<<return<<”….”<<y;

10.Match the following
a)Intranet - rules and conventions for data transfer
b)browsing - private network owned by an organization
c)protocol - free service in internet
- processing of visiting websites
11.An algorithm is given below. Steps are incorrect order
1.Start
2.end
3.if k<=n then
4.f=f*k
5.k=k+1 goto step 3
6.f=1,k=1
7.Print f
8.Read n
a)Rearrange the steps and make it a meaningful algorithm.
b)What is the purpose of the algorithm.
12.a)Find the octal number corresponding to the number BAD16
b)Represent -23 in 2’s complement form
13.The length and breadth of a rectangle is (11.01)2 cm and (10.11)2 cm. Find the
area of the rectangle and express it in binary number system 3
14.Given the following expressions
a)Val = 3
b)Val == 3
1)How are these two different?
2)What will be the result of b if the value of ‘Val’ is 5 initially?
15.a)Companies prefer network of computers rather than independent machines.
Justify this statement?
b)Give example for i)e-mail program ii)Browser
16.A shop keeper wants to buy a computers. But there is only a little space on a table to
place the monitor.
a)As a computer student, what type of monitor will you suggest for him?
b)Justify your suggestion with sufficient points
17.You are asked to prepare a report showing the grades obtained in each subject by
the students of your class using their marks. Explain the main activities to be
done for processing the data.
18.Explain the components of data processing?
19.Why is the paper coming from the laser prints hot explain?
20.Define the following
a)Seek Time b)Access Time c)Latency Time
21.Compare Stack and Queues with an example
22.Write a program to find the factorial of a number using functions?
23.Write the header file for the following functions.
a)getline () b)itoa () c)abs() d)strcmp() e) exit() f) getch()
24.a)Suppose you want to store the names of your three friends. Write a C++
Initialization statement for this purpose
b)If you are asked to input the names, give the input statement for this purpose 2
25.Write a C++ program to merge two sorted arrays A and B
26.Write an algorithm for binary search method

MODEL QUESTION PAPER COMPUTERSCIENCE +1

SET 2

1. Provide the missing terms
a) A +B+…..=ABC
b) 1002 +100 2+1008=………………10 (2 Score)
2)Consider the following C++ code fragment
Int p=1;char c=’A’;
while(p<=10)
{
cout<<C++;
p++;
}
a)Predict the output
b)Modify the above code using for loop (2 Score)
3.Some C++ operators are given below
> * / || ==
a)Categorize and explain each category (3 Score)
4.) Consider the following C++ code fragment
If(p=2) cout<<”Two”;
Elseif(p=3)cout <<”Three”;
Elseif(p=4)cout<<”Four”;
Correct the errors and rewrite using Switch (3 Score)
5) Consider the following code and write the output of d
float add(int a=10,float b=5.0,int c=10)
{ return a+b+c;
}
d=add(5);
6 )A liist of input devices are given below (3 Score)
1)Keyboard 2)MICR 3)OMR 4)Scanner 5)Joystick 6)Lightpen 7)Barc ode Reader
Select the most appropriate device for the following situations.Also specify any one feature of the
device
a)Artists and architects use this device to develop computerized designs
b)DTP operator to input pictures and photographs
c)Children use this device for playing computer games
d)Evaluation of objective type questions
e)Quick processing of bank cheque
7)Pick odd one out and give reason
a)get() b) getchar() c) put() d)getline() (2 Score)
8) Your school needs to set up a computer lab with atleast 10 computers connected together.
Give the s/w and h/w requirements for doing this. (3 Score)
9) Consider the following codes
for( int i=0;i<10;i++) for( int i=0;i<10;i++)
{ if(i==5) break; {if(i==5) continue;
cout<< i;} cout<< I;}
a) Predict the outputs
b) Compare break and continue (3 score)
10) What stylistic guidelines may be followed to design a good program (2 Score)
11)Raju wrote a computer program . While compiling and running he saw many errors
a)Identify the name given to the process of removing errors
b)Briefly explain the type of errors (3 Score)
12).Write a c++ program to find the factorial of a given number (3 Score)
13) Differentiate x=5 and x==5 (2 Score)
14)The filled application forms from the applicants are used to prepare rank list for +1 admission.
a) Identify data and information in this context (1 +2 Score)
b) If an applicant fails to submit application in time which quality of information is affected and how?
15)Write a c++ program to get the following output (3 Score)
1
1 2
1 2 3
1 2 3 4
16) Differentiate call by value and call by reference with an example (4 Score)
17) Predict the output (3 Score)
Int p,q,r,a,b,c;
a=b=c=10;
p=a++ + ++ a ;
q=++b + b++
r= -- c+ --c;
cout<<p<<q<<r;
18)Draw the flowchart to print the largest of three numbers (3 Score)
19)Vinu wanted to buy a computer monitor. He preferred LCD over CRT . Give reason(2 Score)

20)Name the operations in a stack. Explain each with algorithms. (5 Score)

21) Name the operations in a queue. Explain each with algorithms
22) Write algorithm /program to implement sorting in an array. (5 Score)

MODEL QUESTION PAPER PHYSICS +1

SET 9

I. Match the following
A                                                     B
a) Newton’s third law                   PV= a constant
b)Bernoulli’s theorem                    F = ma
c) Isothermal change                    Stress α Strain
d) Hooke’s Law                          Recoil of gun
Venturimeter                               Law of conservation of energy (4 x ½ = 2)
II. The velocity of a particle moving in one dimension changes according to the relation
V = at3 – bt2where v is in m/s and t in seconds. (numerical value of a = 2 and b = 1)
a) Find the dimensions of a and b (2)
b) What is the velocity in the 3rd second (1)
III. A player throws a ball vertically upward with a speed 49 m/s
a) What is the direction of acceleration of the ball during the
i) upward and ii)downward motion. (1)
b) What is the velocity and acceleration of the ball at the highest point? (2)
c) Choosing the upward direction as the +ve direction of x-axis, give the signs of
position (x) and velocity (v) during the upward and downward motion of the ball.
Chose x=0 to be the location of the ball from where it was thrown and t=0 to be
the corresponding time. (g = 9.8m/s2) (1)
IV. Two forces of magnitude F each are acting at a point.
a) The magnitude of the sum of these two forces need not be 2F always – Justify (1)
b) For what angle between these two forces, the magnitude of the resultant
becomes F itself. (1)
V. An object that is in flight after being projected is called projectile.
a) At the highest point, what are the vertical and horizontal components of its velocity? (1)
b) In Javelin throw, 45o is preferred. Justify. (1)
c) Obtain the expression for the range of the projectile (2)
OR
A stone tied to a string is whirled in a horizontal circle with constant speed.
a) What is the direction acceleration of the stone? (1)
b) Draw the figure representing the direction of velocity of the stone at two different
instants, during its motion. (1)
c) Use the figure to obtain an expression for centripetal acceleration (2)
VI. Bernoulli’s theorem is basically about the conservation of energy of a non viscous fluid
in steady flow .
a) State and explain Bernoulli’s Principle (1)
b) Derive Bernoulli’s equation (2½)
c) A spin ball projected deviates from its original parabolic trajectory. Why ? (1)
VII. Free liquid drops and bubbles are spherical in shape if the effect of gravity can be
neglected.
a) How will you explain this? (1)
b) What is the excess pressure inside a drop of mercury of radius 3mm at room
temperature? The surface tension of mercury at room temperature is 4.65 x 10-1 N/m (2)
VIII. In rotational motion Moment of inertia plays a similar role as mass does in linear motion.
a) Give an expression for moment of inertia of a rigid body. (½)
b) State and explain perpendicular axes theorem. (2)
c) Moment of inertia of a ring about an axis passing through centre and
perpendicular to the plane of the ring is MR2. Find Moment of inertia about any of
its diameter. (1)
IX. A body of mass M and radius R is allowed to roll along an inclined surface of inclination θ
and height h.
a) Obtain the expression for velocity of the body when it reaches the bottom of the plane (2)
b) Obtain the acceleration of the body along the inclined plane (1)
c) If a solid cylinder and hollow cylinder of same mass and radius are allowed to fall
along the plane from same height, which will reach bottom first and why? (1)
X. Kepler’s laws of planetary motion explain the motion of planet around sun.
a) Obtain a relation between angular momentum and areal velocity of the planet (2)
b) State and prove kepler’s second law (2)
XI. a) Escape velocity from the surface of earth is 11.2km/s. A body is projected with a speed
twice the escape speed from earth. What is the speed of the object far away from earth
(infinity)? Ignore the presence of other planets and sun. (3)
XII. A gas taken in a cylinder with non-conducting walls and frictionless movable piston does
work when heat is supplied to it. Find the expressions for work done if the process is
a)Isothermal b) Adiabatic (4)
XIII. Heat engine is device which converts heat energy to mechanical energy.
a) Draw Carnot cycle and what are process involved in Carnot cycle (2)
b) “The efficiency of a heat engine can never be 100% and the coefficient
Performance of a refrigerator can never be infinity” – Which law of
thermodynamics, put this limitation? State and explain this law (2)
OR
In a thermodynamic process neither heat is absorbed nor rejected
a) Name the process (1)
b) Obtain the expression for work done during this process (3)
XIV. Any motion which repeats itself at regular intervals of time is called periodic motion.
a) What is the condition for a periodic motion to be Simple Harmonic? Give an
example for SHM (1½)
b) Write the expression for total energy of a particle which is in SHM. For what value
of displacement KE and PE are equal during the motion? (2)
XV. In sonometer experiment a segment of a stretched string is vibrated using a tuning fork.
a) Why for a particular length of the segment the paper rider on it vibrates
vigorously and then thrown off? Name the phenomenon (1½)
b) Obtain the expression for the frequency of fundamental mode of vibration of the
string. (2)
XVI. A person likes to stop and park his car on a steep place, which has an inclination of
150 with the horizontal.
a) What should be the minimum friction between the wheels and surface to prevent
the car from sliding down? (1)
b) Whether the safe parking in this place depends on the mass of the car? Give
reason. (2)
XVII. Jumping athletes usually made to land in loose sand. Why (1)
XVIII. Energy neither be created nor be destroyed but can only change from one form to
another.
a) Prove this in the case of a freely falling body (2)
b) A bus and a car are moving with same kinetic energy. Which has greater
Momentum? If same retarding force is applied to both, which one will come to
rest in a shorter time? Why? (2)

MODEL QUESTION PAPER PHYSICS +1

SET 8

1) Fill in the blanks
A B C
a) Power Watt ……………….
b) ………………. kgm2 ML2
c) Torque Joule ……………….
d) Surface Tension ………………. MT-2
(Score 2)
2) If a + bt + ct 2 = x, where x – displacement, t – time. Find the dimensions of b and c. (Score 2)
3) An astronaut in a space shuttle moves along a straight line. The data given below gives the
measured velocities at every two seconds starting from t = 2s.
Velocity
(m/s)
2 4 6 2 0 -2 -4 -2
Time
(s)
2 4 6 8 10 12 14 16
a) Draw v- t graph from t = 2 s to t = 16 s. (Score 3)
b) Find the average acceleration in the time interval from t = 2s to t = 6 s. (Score 2)
4) An athlete throws a javelin with a velocity ‘U’ at an angle ‘θ’
a) Name the shape of the path described and the nature of motion. (Score 1)
b) To achieve the maximum horizontal distance at what angle should he throw the javelin. (Score 1)
c) At the highest point of its motion, what are the values of vertical and horizontal components
of velocity? (Score 2)
d) Derive an expression for maximum horizontal distance travelled. (Score 2)
5) A body is suspended from the roof of a lift by means of a string. If the mass of the body is ‘M’ and ‘T’
the tension of the string, then
a) When the lift is not moving, T = …………………..
b) If the lift is moving up with an acceleration a, T = …………………..
c) If the lift is moving down with an acceleration a, T = …………………..
d) If the string is broken T = ………………….. (Score 4)
6) A car of mass ‘m’ is moving along a circular banked road of radius ‘r’. Draw a neat diagram to
represent the various forces acting on the body. (Score 2)
7) When a body is lifted through a height ‘h’ work has to be done. Let the body fall freely from the
same height .
a) Graphically represent the variations of PE and KE (Score 1)
b) Find the height at which PE = KE (Score 1)
c) State work energy theorem. (Score2)
d) State and prove law of conservation of energy in this case. (Score2)
8) A person is sitting on a stool that is free to rotate nearly without friction about a vertical axis. While
rotating suppose the person stretches his hands out.
a) What happens to the moment of inertia if he folds his hands? (Score 1)
b) What happens to the speed of rotation? (Score 1)
c) State the law behind this phenomenon. (Score 2)
9) Earth can be treated as a sphere of radius ‘R’ and mass ‘M’. ‘A’ is a point at a height ‘h’ above the
surface of Earth . The acceleration due to gravity at Earth surface is ‘g’
a) Obtain a formula to evaluate the acceleration due to gravity at A . (Score 2)
A
b) If we move from equator to pole, the value of ‘g’ …………………………
(increases / decreases / remains the same) (Score 1)
c) What is the value of ‘g’ at the centre of earth? (Score 1)
11-(i) When a fluid is moving, the pressure changes with its velocity. Then
a) How will you explain the working of a sprayer? (Score 2)
b) Name the principle behind this. State the principle. (Score 2)
OR
11-(ii) When rain drops are falling down, they will attain a constant velocity after some time
a) Name the velocity (Score 1)
b) Write the condition at which the drop attains equilibrium. (Score 1)
c) Arrive at an expression for this velocity. (Score 2)
12- By applying first law of thermodynamics
a) Obtain relation between Cp and Cv (Score 3)
b) What happens to the internal energy during isothermal process? (Score 1)
13) A reversible heat engine is operating at two different temperatures T1 and T2 with
an ideal gas as the working substance.
a) Draw the Carnot cycle and explain its working. (Score 3)
b) Derive the expression for efficiency. (Score 2)
14-(i) Which of the following motions represent SHM?
a) Rotation of earth about its axis.
b) Oscillations of the simple pendulum.
c) An arrow released from the bow. (Score 1)
Temperature
(ii) Justify your answer mathematically and hence derive the period of oscillations of
the same. (Score 3)
15-a) When you perform experiment with resonance column apparatus in a lab, at certain height
you can hear maximum sound. What is the concept behind it? (Score1)
b) For an one end closed organ pipe, show that υ1 : υ2: υ3 =1 : 3 : 5 (Score2)

MODEL QUESTION PAPER PHYSICS +1

SET 7

1. Fill in the blanks
a) 1AU=1.5x108 km C = 3x108m/s C = …………… AU/s
b) Force of friction = 1.96N Normal Reaction = 19.6 μ = ……………
c) Time Period = 4 Sec Mass = 1 kg Spring Constant K = …………
d) No. of significant figures
in Area = ………………. Breadth = 2.01 cm Length = 1.00 cm
(4)
2. Mechanical power is represented by P=Fv + Av3ρ where F is the force, v is the velocity, A is the area
and ρ is the density
a) The dimensional formula of power is ………………. (1/2)
b) Check the dimensional validity of the above equation (1)
c) Which of the following equations can’t be obtained by the dimensional method?
i) 􀜶 = 􀜭􀶧 􀯟
􀯚 ii) E = k mv2 iii) P= h ρg iv) N= N0e-λg (1/2)
3. Two cars A and B travelling with speed 20 m/s and 10 m/s respectively applies breaks, so that A
comes to rest in 10 seconds, B comes to rest in 15 seconds
a) Draw the velocity time graph of A and B in the same graph (1)
b) From the graph determine which of the two cars travelled further after breaks were applied and by
how much distance (2)
c) In the above process the wear and tear of which of the car get affected more (1)
4. An object is projected with velocity v at an angle θ to the horizontal
a) Obtain a mathematical expression for the range in the horizontal plane (2)
b) What are the conditions to obtain more horizontal range (1)
c) Find the maximum height of the object when its path makes an angle of 300 with the horizontal
(velocity of projection = 8 m/s) (2)
5. 􀜣⃗ and 􀜤􁈬 ⃗ are two non-zero vectors
a) If 􀸫􀜣 􁈬􁈬⃗ 􀝔 􀜤 􁈬 ⃗􀸫 = 􀜣⃗ . 􀜤􁈬 ⃗, what is the angle between 􀜣⃗ and 􀜤􁈬 ⃗ (1)
b) Find the value of 􀜣 􁈬􁈬⃗ . (􀜣⃗ x 􀜤 􁈬 ⃗) (1)
c) The parallelogram law is used to find the resultant of two vectors. Find the magnitude of the
resultant of these two vectors in terms of their magnitude and angle between them. (3)
6.
a) A Cricket player throws his hands backward while catching a ball. Give the reason? (1)
b) When the bullet fired from a gun, the gun recoils freely. Which one has greater kinetic energy -
gun or bullet? Explain (2)
7. An electron of mass m moves with a uniform speed v around the nucleus along a circular path of
radius r.
a) Derive an expression for the acceleration of electron (2)
b) Explain why the speed of electron does not increase even though it is accelerated by the above
acceleration? (1)
8. Work is required to be done to lift a body from ground. Let the body be dropped from the height h
a) State the work - energy theorem (1)
b) Draw graphically, the variation of Kinetic Energy (K.E) and Potential Energy(P. E) with the
height of the body where do you find
i) The maximum P. E? ii) The maximum K. E? (2)
c) State and prove the law of conservation of energy in this case (3)
9. Moment of inertia of a thin ring of radius R about an axis passing through any diameter is 􀬵
􀬶 􀜯􀜴􀬶
a) To get the moment of inertia of the same ring about an axis passing through any tangent which of
the following theorem you can use? State the theorem
i) Perpendicular axis theorem ii) Parallel axis theorem (1 􀬵
􀬶)
b) What is the radius of gyration of the ring about an axis passing through any diameter? (1/2)
c) A thin metal ring of radius 0.25 m and mass 2 kg starts from rest and rolled down in an inclined
plane. If the linear velocity on reaching the foot of the plane is 2 m/s, calculate its rotational K.E.
(2)
10. When we throw a stone into the air it comes back to the earth. But if we increase the speed of the
stone, it may escape from the gravitational attraction of earth.
a) Explain the term escape velocity. (1)
b) The radius of the earth is reduced by 4% of its initial value. The mass of the earth remains
unchanged. What will be the percentage of change in the escape velocity. (2)
c) Assuming that planets move in circular orbits, derive Kepler’s third law on planetary motion. (2)
11. When longitudinal tension is given to a steel wire, it elongates
a) Name the law that gives the relation between applied force and elongation of steel wire. (1)
b) State the law (1)
c) Find out the load to be suspended at the end of a brass wire at length 18m to stretch it through
1mm. The diameter of the wire is 0.2m. Young’s Modulus = 20 GPa. (2)
12. When a fluid moving through a pipe of varying cross-sectional area, the sum of pressure energy, KE
per unit volume, PE per unit volume remains a constant.
a) Name the theorem underlying the statement. (1)
b) Derive an expression for the above theorem. (3)
13. A thermodynamic process is one in which the thermodynamic variable (P,V,T etc.) change
a) Name the thermodynamic process in which 􀜲􀜸􀰊= constant (1)
b) State and explain first law of thermodynamics (2)
c) Derive an expression for the work done in an adiabatic process involving an ideal gas in terms of
pressure and volume. (2)
OR
a) Which thermodynamic process is also called an iso-entropic process (1/2)
b) The efficiency of Carnot engine is 􀬵
􀬺. If on reducing the temperature of the sink by 650C its
efficiency becomes 􀬵
􀬷, find the temperature of sink and source (1 􀬵
􀬶)
c) Obtain the expression for the work done during an adiabatic process (3)
14. Vertical oscillation of loaded spring in water dies out rapidly
a) Name the type of oscillation here (1)
b) How can you maintain the oscillation of loaded spring in water? (1)
c) A girl swings in sitting position on a swing. How will the period of swing be affected,
if she stands up? (2)
15. A girl tries to find out the frequency of a turning fork using sonometer apparatus
a) What is the nature of wave produced in a sonometer (1)
b) Explain why the paper rider throws away at a particular resonating length? (2)
16. A train is approaching a station blowing its siren. A man standing on the plat form observes change
in frequency of the sound produced by the train
a) What is the phenomenon called (1)
b) Write down an expression for the apparent frequency heard by a stationary observer when the
source is approaching him with a velocity u? (1)

MODEL QUESTION PAPER PHYSICS +1

SET 6

I 1. Find the odd pair from the following .
a) Work - Energy b) Stress - Pressure
c) Force – Momentum d) Surface Tension - Surface Energy ½
2. Dimensional analysis can be used to check the correctness of an equation.
a) Name the principle which is used to correct an equation based on dimensional analysis. ½
b) Use the principle to check the following equation whether correct or not.
i) S = ut + ½ at2 ii) E = ½ mv2 + mgh iii) t = 2p Ö(g/l) 1 ½
3. If the percentage error in measurement of radius of sphere is 2% , then what is the percentage error
in the volume. 1
[ Total 3 ½ Score]
II 1. Identify the motions of:
i) a butterfly in search of nectar. Ii) a caroms coin over a board 1
2. Draw the velocity – time graph using the following data.
Time (s) 0 5 10 15 20 25
Velocity
(m/s)
2 4 6 8 10 12
What is the acceleration in the time interval 10 – 15 sec from the graph. 1 ½
4. Derive displacement –time relation using the v-t graph. 1 ½
5. The acceleration ‘a’ in m/s2 of a particle is given by a = 3t2 + 2t + 2 , where ‘t’ is the time in
seconds. IF the particle starts out with a velocity at the end of 2 sec. 1
[ Total 5 Score]
III. 1. A vector has both magnitude and direction. Identify vectors from following.
Force , Work , Time, impulse, charge. 1
2. Find the angle between two vectors of Ā = 2ĭ + 3ĵ - 4ķ and B = 4ĭ + 5ĵ - 2ķ 1 ½
3. Is the flight of a bird a practical example of parallelogram law of vector addition. Explain with a
neat diagram. 1 ½
[ Total 4 Score]
IV. A javelin is thrown by an athlet at an angle q with the horizontal.
a) Draw the velocity – time graph for the horizontal component of the velocity of the javelin. ½
b) Arrive at an expression for the maximum height reached by it. 1 ½
c) A bomb should be dropped from an aeroplane to hit the target. Why ? 1
[ Total 3 Score]
V. a) While catching a ball the cricket player draws his hands backwards. Why? 1
b) Identify the law behind this? ½
c) Driver running a three wheeler with a speed of 36 km/hr sees a child standing in the middle of
the way and breaks the vehicle to stop in 4 seconds just in time to save the child. What is the
average retarding force on the vehicle? The mass of the vehicle is 400kg and mass of the driver is
65kg. 1 ½
[ Total 3 Score]
VI. At a curved track, an inclination is given by raising the outer side a little above the innerside.
a) What is the advantage of this situation? 1
b) If the track has a curve of radius 400m and banked at an angle 50 and given coefficient of friction
as 0.2, find the optimum speed to avoid wear and tear of the tyre. 1
c) Find the maximum permissible speed to avoid skidding in the above case. 1
d) Why does a cyclist, negotiating a curve lean his bicycle? 1
[ Total 4 Score]
VII A cat is able to land on its feet when thrown in to air.
a) Name the law behind it. ½
b) State and explain it with the help of the law. 1 ½
c) A girl has to lean toward right while carrying a bag in her left hand. Why ? 1
[ Total 3 Score]
A
B
VIII. A body is dropped from the top of a tower of height ‘h’ . h
a) Derive expressions for the total energy of the body at positions A,B and C. 2
b) Arrive at a conclusion from the above findings. 1
c) Show the variation of kinetic energy and potential energy with position C
graphically. 1
[ Total 4 score ]
IX. a) A body is taken from the surface of earth to a height ‘h’ what will happen
to its weight? ½
b) Find the ratio of the weights of a body which is taken to height and depth equal to half of
the radius of earth. 2 ½
c) No fuel is required by a satellite to keep it in orbiting (neglect air resistance). Justify the
statement. 1
d) When planets come closer to the sun they move faster and if they are away move slower.
Explain the fact with the statement of law governing planetary motion. 2
[ Total 6 score ]
X. A small metal sphere is falling through a large column of caster oil.
a) Name the force acting on the sphere. ½
b) After some time the sphere is found to attain a constant velocity. Obtain an expression for this
velocity. 2
c) Why rain drops do not acquire a high velocity even though they are falling from a great
height? 1
[ Total 3 ½ score ]
XI. A sprayer spreads a perfume as tiny particles.
a) What is the principle of its working? ½
b) State the principle. 1
c) Can this principle be used to find the velocity of a rapid flow of water in a river? Explain. 1
[ Total 2 ½ score ]
XII. A gas has two specific heat capacities.
a) Define these specific heats ? 1
b) Derive Cp – Cv = R 3
c) Write the value of Cv for a diatomic gas. 1
[ Total 5 score ]
XIII.
a) A tunnel is set up through the centre of the earth and an object is dropped into it. What is the
type of the motion executed by the object. 1
b) Find the expression for the period of oscillation of a simple pendulum for small oscillation. 2
c) What is the frequency of oscillation of a simple pendulum mounted in lift falling freely under
gravity? 1
d) A man with a wrist watch on his hand falls from the top of a tower. Does the watch give correct
time during his free fall? 1
W [ Total 5 score ]
XIV. 1. Using the formula V= (g P/r ) ½ to explain why the speed of sound in air.
a) is independent of Pressure?
b) Is increasing with temperature?
c) Is increasing with humidity? 3 score
2. A stone is dropped from the top of a tower of height 300m splashes into water of a pond near
the base of the tower. How long will it take to hear the sound of splash at the top of tower.
Given speed of sound in air is 340m/s. 2 score
[ Total 5 score ]
Source
T1 K
Sink
T2 K

MODEL QUESTION PAPER PHYSICS +1

SET 5

1. Complete the equations a) 1 MW = ……… J/s b) 1 fm = …… m
c) 10-9 sec = 1 ……sec d) 100mg = …….kg 2
2. Match the following
Physical Quantity Equation Dimensional Formula
Work F. r2/m1 m2 M L-1 T -1
Gravitational Constant F dx/Adv M L T -2
Coefficient of viscosity F.d M-1 L3 T -2
3
3. If the radius of earth is shrinked by 3%, What would be the percentage change in volume ? 2
4. Rajesh was watching some fishes moving under water in an aquarium. He located positions of a
golden fish with respect to the corner point taken as an arbitrary origin.
a) Name the type of motion of fishes under water. ½
b) If the golden fish moves a straight distance of 20cm in 4 seconds and then 15 cm in 5seconds 1
determine its average speed. x (m)
c) Derive the following equations of motion for a uniformly accelerated motion.
i) vt = vo + at ii) S = vot + ½ at2 2
5. Write the principle or law behind the following facts
a) Passengers in a starting bus falling backwards
b) A cricket player draws his hands backward while catching a ball.
c) A gun recoils after firing.
d) In a nest the birds are flying with different momenta but the nets possesses zero momentum.
[ Total Score 4]
6. A spring attached with a block of mass ‘m’ is oscillating horizontally over a smooth table.
a) Name the constant associated with the spring motion. Give its unit. 1
b) State and explain the law of conservation of energy of the oscillating spring system. 3
c) Draw the energy – position graph showing variation of P.E. , K.E. and T.E. 1
[ Total Score 5]
7. Two billiard balls A and B of masses m1 and m2 moving with velocities u1 and u2. At a time they
collide elastically. After collision their velocities are changed as v1 and v2.
a) What are elastic collisions? Give one example. 1
b) Show that relative velocity is numerically conserved in elastic collision in one dimension. 2
c) Derive the final velocities of A and B after collision 2
[ Total Score 5]
8. Gopal was boasting to his friend Bhaskar “ My grandpa raised an elephant by his fore finger when a
lifting force applied at the centre of mass of elephant”.
a) Give the importance of centre of mass of a body. 1
b) Write the relation for its position, velocity and acceleration of the centre of mass. 2
c) The circus players fold their hands to adjust their angular speed of rotation. Explain the situation with
proper theoretical support. 2
[ Total Score 5]
9. Why do girders are designed to be in the form of letter ‘I’. [ Total Score 2]
10.In a continuous flow of a fluid through a pipe of varying cross section from 2 x 10-4 m2 to
5x 10-4m2. Find out the velocity of emerging fluid , if it is entering with a velocity 8 m/s . 1 ½
c) Venturimeter is used to measure the flow of a liquid through a pipe. Using the principle behind
its working derive a relation for the velocity of flow of the liquid. 3
[ Total Score 5]
11. In a resonance column the waves generated are stationary.
a) Mention how does a standing wave obtain. 1
b) Draw the wave form in a resonance column. 1
c) If the pipe open at one end is raised to a height ‘L’ it resonates, deduce the possible frequencies. 3
[ Total Score 5]
12. Simple pendulum is a system executing simple harmonic oscillations with a period T
a) Write another system in simple harmonic motion. 1
b) Obtain the relation for T. 2
c) Comment on the dependence of T on : i) length of pendulum ‘l’ and ii) mass of the bob ‘m’. 2
[ Total Score 5]
13. The working of Carnot’s heat engine is reversible.
a) If we reverse the direction of working of a heat engine, we get another device. What is it? 1
b) Explain the second law of thermodynamics . 3
c) A thermometer showed the body temperature of a person noted by a nurse as 1040F. Whether he
is suffering from fever if normal human body temperature is 380C. 2
[ Total Score 6]
OR
14. a) Mention the different modes of heat transfer. 2
b) Explain the natural phenomenon of Sea breeze and land breeze 1 ½
c) Given area of cross section of a metal rod is 2.5 m2 and conductivity of 406Wm-1 K-1 . At steady
state a temperature fall of 0.5 0C is existing over unit length. 2 ½
[ Total Score 6]

MODEL QUESTION PAPER PHYSICS +1

SET 4

2) Explain the reason for the following situations.
a. Cricketer moves his hands backwards while holding a catch.
b.The passengers in a stationary bus get thrown backward with a jerk when the
driver starts the bus suddenly.
c. Massaging is given immediately to a patient having heart attack. [1+1+1]
3 ) Two cars A & B traveling with speed 20 m/s & 10m/s respectively applies brakes,
so that
A comes to rest in 10 sec and B comes to rest in 15 Sec.
a) Draw the velocity time graph of A&B in the same graph
b) From the graph determine which of the 2 cars traveled further after brakes were
applied and by how much distance .
[2+2]
4) A frog saw an insect on the group at a horizontal distance of 30 m from it. The frog can jump
with a speed 20 m/s in any direction. It jump with this initial speed and land on the insect.
a. What is the type of motion made by the frog & Diffine.
b. Find the angle that frog’s initial velocity makes with the horizontal.
c. Find the minimum distance the insect have to keep from the frog, so that it can escape from
the frog. [2+2+2]
5.) Four person sitting in the back seat of a car at rest, is pushing on the front seat.
a. Does the car move. Why ?
b. State the law which help you to answer above question.
c. What are the significance of that law.
d. Long jumpers take a long run before the jump. Why ? [2+2+1+2]
6) A motor car traveling at 30 m/s on a circular road of radius 500m. It is increasing it’s speed at
the rate of 2m/s2.
a. What is the direction of centripetal acceleration?
(i) Along the tangent
(ii) Towards the centre
(iii) In the direction of linear velocity
(iv) In the direction of angular velocity
b. Find the Centripetal acceleration in the above case.
c. Find the total acceleration in the above case. Draw the direction of net acceleration [1+2+2]
7) Moment of inertia of a body about an axis is the sum of moments of inertia of each and every
particle of the body about the same axis.
a. What is meant by moment of inertia of a particle ?
b. Can you think of a body having the same moment of inertia for all possible axis ? If so give
an example and if not explain why this is not possible.
c. Can you think of a body that has the same moment of inertia for all axes passing through
certain point. If so give an example and indicate where the point is located. [2+1+1]
8) Moon is the only satellite of earth. Mass of moon is very much lower than that of earth.
a. Is there any difference in gravitational force of moon and earth ? Explain.
b. Deduce an equation for gravitational potential energy ?
c. A girl argues that even today if we visit moon we can see the foot steps of Neil Armstrong.
What is your opinion ? [1+2+2]
9) There is a story in Greek mythology, a stone thrown upward by the hero Hercules never comes
back.
a. What happens to the stone ?
b. Derive an expression for such a situation.
c. “A space craft consumes more fuel in going from the earth to the moon that it takes for a
returntrip”. Comment. [1+2+2]
10) a. Steel wire shows elastic properties. What you mean by elasticity.
b. Name the different modui of elasticity
c. What is the difference between pressure and stress?
d. "Steel is more elastic than rubber" comment on the statement. [1+1+2+1]
11) "Surface energy is numerically equal to surface tension"
a. Define surface tension
b. Establish the relation between surface energy and surface tension
c. "Small drops of a liquid are spherical while large drops are elliptical." Explain.
d. "What drop placed on a lotus leaf is spherical while the same drop spread on a plastic
plate". Justify? [1+1+1+2]
12) When a gas is contained in a closed vessel, it exerts pressure on the walls of the vessel.
a. It can be explained on the basis of
i) Einstein's theory of relativity
ii) Newton's laws of motion
iii) Kinetic theory of gases
iv) Bernoulli's theorem
b. Arrive at an expression for pressure exerted by a gas on the walls of the vessel.
c. How the pressure of a gas relates with the mass of its molecule. [1+2+1]
13) A boy fixed a string at one end and gave sudden jerks at the other end continuously in the up
and down directions.
a. What is the nature of the wave produced in the string and name the wave
b. Draw the wave form and explain amplitude, wave length and time period
c. A brass wire 1m long has a mass 6 x 10-3 Kg. If it is kept at a Tension 60N,
what is the speed of the wave on the wire. [1+2+1]

MODEL QUESTION PAPER PHYSICS +1

SET 3

1. Match the following
A B
(a) Force 10…..
(b) work N
(c) Micrometer M L T……
(D) Theory of relativity Thomas Alva Edison (4×1/2=2)
2. (a) If x=a+bt+ct…. Where ‘x’ is in meter and ‘t’ is in second, find the
dimensional formula of ‘b’ ? (1)
(b) The physical quantity ‘p’ is related is four observable a, b, c, & d as
{ equation} The percentage error of measurement in a, b, c, & d are
1%. 3%. 4% & 2% respectively. What us the percentage error in ‘P’.?
4. Two men are pulling a stone from to different mutually perpendicular
direction with the same force
(a) Which law can apply to find the direction of motion ?
(b) Derive an expression to find magnitude of resultant force ?
5. While firing a bullet ,like gun must be held tight to the shoulder.
(a) which law of conservation explains the recoil of gun ? (1/2)
(b) Show that recoil velocity is opposite to the muzzle velocity of the bullet (1)
(c) A gun of mass 5 kg, fire a bullet of mass 5 g, vertically upwards to a height of
100 m. calculate the recoil velocity of gun? (1)
(d) How weight is different from mass.
6. work is to be done is lift a body from the ground . Let the body be dropped
from certain height.
(a) State work –energy theorem
(b) Graphically represent the variation of KE and PE with respect to the body
(1 ½)
(c) from the graph where will you find
(1) Maximum PE and (2) Maximum KE (3)
6. Moment of inertia of a sphere about a diameter is
(a) Which is meant by moment of inertia (1)
(b) Which theorem of moment of inertia is used to calculate the moment of
inertia of sphere about a tangent AB
(c) State perpendicular axis theorem
(d) Calculate the moment of inertia of a sphere about a
tangent A B. Case necessary theorem
7.Mathematical form of perpendicular axis theorem is (a) I2-Ix+Iy………………
8. Value of g on earth varies from place to place and reduies as we go higher and
higher above the surface of earth
(1) Find the expression of ‘g’ at altitude
(2) At what height above the surface of the earth will the value of reduced to
g/4 ? (1)
(3) Derive an expression for the minimum velocity with which a satelite can
revolve around the earth in it’s orbit
(4) State- kepler’s puiodic law
11.Three moles an ideal gas kept at constant temp of 300K are compressed
from 6 litre to 2 litre
(a) which is the thermodynamic process involved ? (1)
(b) Calculate the work done required to compress ? (2)
12. The engine s of the motor vehicles convert thermal energy into
mechanical energy .They are called heat engines
a)discuss the construction and the different stages of working of a heat engine
c) Calculate the efficiency of the connot’s engine working b/w the steam
point and the …………. Point
(1)
12. A particle of mass ‘m’ Executing SHM
a) Arrive the differential equation ………………………………………. (2)
b) Arrive at an expression for tune period of a simple pendulum (3)
c) What do you mean by second’s pendulum (1)
13. consider a string stretched b/w two fixed support. A stationary wave can
be produced on the string by suitably exiting with a tuning fork.
(a)What is a stationary wave (1)
(b) Explain condition for the formation of a stationary wave
(c) Draw the fig:
………………………………………………………………………….harmonic of vibration of a
stretched string fixed at both ends (2)

MODEL QUESTION PAPER PHYSICS +1

SET 2

1. While discussing the period of oscillation of a simple pendulum, one student argues that the
period depends on mass of the bob.
a) What is your opinion?
b) How will you prove the argument dimensionally? [1+2=3]
2. The velocity – time graph of an object moving along a straight line is shown below.
a) Define uniform velocity.
b) Calculate the displacement of the object between O and 10 seconds.
c) Find the average velocity during the whole journey.
[1+2+2=5]
3. A body is fired with an average velocity of 320m/s at an angle of 30º with the horizontal.
a) What is the nature of the path of the projectile?
b) Find the time to reach its maximum height
c) Find the maximum height attained.
d) With the same velocity, what is the maximum range possible?
[1/2+11/2+11/2+11/2=5]
4. A circular track of radius 400m is kept with outer side of the track raised to make 5º with the
horizontal (Coefficient of friction= 0.2)
a) Name the track
b) What is the optimum speed to avoid wear and tear of tyre ?
c) What is the maximum speed with which the vehicle will move without skidding?[1+2+2=5]
5.
a) The velocity – time graph of an object is shown below. Find the sign of work done in the
following intervals.
10
V (m/s)
2 5 10
t (s)
E
D
C
A B
t (s)
V (m/s)
b) Two bodies of masses 1Kg and 4Kg have equal linear momenta. What is the ratio of their
Kinetic Energies? [2+3=5]
6. Moment of inertia of a ring about an axis passing through its centre and perpendicular to its
plane is MR2 where M is the mass of the body and R its radius.
a) What is meant by moment of inertia?
b) Explain the parallel axis theorem.
c) State perpendicular axis theorem.
d) Calculate the moment of inertia of a rin of mass 3Kg and radius 0.5m about a tangent in
its plane. [1+2+2+2=5]
7. When we throw a stone into air, it comes back to earth. But when we increase the speed of the
stone, it may escape from the gravitaztional field of earth.
a) What is the value of escape velocity of earth?
b) Obtain an expression for escape velocity.
c) Will a simple pendulum oscillate in an artificial satellite? [1+2+2=5]
8.
a) What is surface tension?
b) Why does a parachute descend slowly where as a stone dropped from the same height falls
rapidly?
c) What is the approximate volume strain of a cube when each edge of a cube shortens by
1%? [1+2+3=6]
9.
a) There are two wires of same material and same length while the diameter of the second
one is two times the diameter of the first one. Then what is the ratio of extension produced
in the wire by applying the same load?
b) Identify the type of modulus of elasticity in the above problem [2+1=3]
10. Thermodynamics is a branch of physics dealing with the inter-conversion of heat and energy.
a) What is meant by thermal equilibrium
b) State first law of thermodynamics.
c) State second law of thermodynamics.
11. Carnot engine is an ideal heat engine.
a) What is meant by heat engine?
b) What are the four stages of Carnot engine?
c) Obtain the equation for its efficiency.
d) Refrigerator is a heat engine. Is the statement correct? Substantiate. [1+2+1+1=5]
12.
a) While performing resonance column experiment, we can hear a cooing sound. What is the
physical concept involved in it?
b) Explain the normal modes of vibrations in the case of air in a closed pipe at both ends and
draw it graphically. [[2+2=4]

MODEL QUESTION PAPER PHYSICS +1

SET 1

1. A body is thrown vertically upward into air with an initial velocity ‘V0’
a) What will be the velocity at its maximum height. Why? (1)
b) Find the time taken to reach maximum height? (2)
c) When air resistance is taken into consideration, it is found that time of ascent is less than time of
descent. Is this statement true? Justify (2)
2. When a train traveling at a high speed with its whistle blowing, approaches to you on the platform, the
pitch of sound whistle appears to rise
a) Which is the scientific phenomenon behind it? (1)
b) State that phenomenon (1)
c) A person is standing on a railway platform. An engine while approaching the platform blow, a whistle
of pitch 660Hz. The speed of engine is 72Km/hr. Calculate the apparent pitch of whistle as heard by the
person. Velocity of sound is 340m/s. (3)
3. Modulus of elasticity of a material is the ratio of stress and strain
a) Young’s Modulus for a perfectly rigid body is------------------------ (1)
b) One end of a rope of length 4.5cm and diameter 6mm is fixed on the branch of a tree. A monkey
weighing 100N jump to catch tree. Find elongation (given Y=9.8x1011N/m) (3)
4. Two cricket balls are colliding with each other
a) Name the collision (1/2)
b) Say whether the law of conservation of kinetic energy hold good in this case. Why? (1)
c) State and prove other conservation law applicable here. (2 1/2)
5. Escape velocity of objects in a planet depends on mass and size of the planet
a) Write down the expression for escape velocity on the surface of earth (1)
b)Give reasons why the moon does not have an atmosphere around it (2)
6. a) Heat from the sun reaches the earth. Which method of heat transmission occurs in this case. (1/2)
b) Thermal conductivity of Aluminium is 205Jm-1s-1deg-1.What is meant by this (2)
c) A man wears some woolen cloth of thickness 3mm in winter. Thermal conductivity of the material of
cloth is 0.05Wm-1deg-1. If the body temperature and outside temperature are 350C and 100C
respectively, how much amount of heat is lost per square meter of the clothes from his body in one
hour? (3)
7. Water boils at 1000c and is converted into vapour
a) Which thermodynamic process involves in this statement. Explain thermodynamic process (1 1/2)
b) Obtain a mathematical formula for work done in the above thermodynamic process (2 1/2)
c) Three moles of ideal gas kept at a constant temperature of 300K are compressed from a volume of
4 litres to 1 litre. Calculate work done during this process. (2)
8. A mass is suspended at one end of a spring and the other end of the spring is firmly found at the ceiling.
If the mass is slightly depressed and released, it will execute oscillations.
a) Write down the expression for frequency of oscillation of the mass (1)
b) If the spring is cut into two equal halves and one half of the spring is used to suspend the same mass,
then obtain an expression for the ratio of periods of oscillation in two cases. (2)
c) If the system is completely immersed in water, then what happens to the oscillations? (2)
9. Give examples for the following
a) A dimensionless, unitless quantity (1/2)
b) A dimensionless physical quantity but having unit with SI system (1/2)
c) Two physical quantities which have the same dimensions (1)
10. Water cannot wet the feather of ducks. A physical quantity called angle of contact, determines
whether a liquid will spread on the surface of a solid or it will form droplets on it
a) Define angle of contact (1)
b) A wire of internal radius 3cm and external radius 3.2cm is rested on the surface of a liquid and
then raised. An extra pulling force equivalent to the weight 3.03gm is required before the film breaks than
it is after. Calculate surface tension of the liquid. (2)
c) Derive an expression for the capillary height of a liquid in a narrow tube. (3)
OR
To keep a piece of paper horizontal .You should blow over, not under it
a) Which is the principle behind it (1)
b) Stat the principle and derive it (3)
c) A cylindrical tube has a cross section of 8cm2 on one end and other end has a coss section of 12cm2. If
the liquid flows inside the tube is 0.5m/s. What is the speed of ejection of the liquid through the other
end. (2)
11. Moment of inertia of a disc about diameter is (MR2)/4. where M is the mass and R is the radius of the
disc.
a) What is the moment of inertia of the disc about a tangent in its plane (1)
b) Which theorem is used for the above calculation (1/2)
c) State the theorem (1 1/2)
12. a) State the law of equipartition of energy (1 1/2)
b) A flask contains argon and chlorine in the ratio of 2:1 by mass. The temperature of the mixture is 270C
Obtain the ratio of root mean square velocity of molecules of two gases. Atomic mass of argon=39.9U,
Molecular mass of Chlorine=70.9U (2)
13. A body is projected into the air with a velocity
a) Which component of velocity is constant throughout the projectile motion (1)
b) Obtain an expression for time of flight and horizontal range (2)
c) Find the minimum velocity with which a stone is projected in order to hit a target 20m away
(g=9.8m/s2) (2)

CHEMISTRY MODEL QUESTION PAPER

SET 5

1. Complete the following table
(3)
Volume at STP No. of moles Mass in gms
100 ml CO2 ------ ------
------ 0.5 mole of N2 -------
-------- ---------- 20 g of CH4
2. Emission spectrum or absorption spectrum is used as a finger print of an atom.
a. Give one difference between absorption and emission spectrum (1)
Yellow light emitted from a Na lamp has a wavelength ( λ ) of 550nm. Calculate the frequency
and waves of yellow light (2)
b. Illustrate Pauli’s exclusion principle with electronic configuration of ‘N’ atom. (2)
3. The hybridization of carbon in ethane,ethane and ethyne are different.
a. What is hybridization?
b. What are the different hybridization of carbon in ethane,ethane and ethyne (3)
4. Quantitative measure of tendency of element to lose electron is Ionization energy
a. Ionization energy of Nitrogen is greater than Oxygen. Why? (2)
b. Ionization energy decreases regularly down the group of periodic table.Why ?
5. VSEPR theory is used to determine the shape of molecule
a. Write the no. of bond pairs of electrons and lone pair electrons in NH3 molecule. (2)
b. o-nitrophenol is steam volatile where as p-nitrophenol is not. Justify your
Answer giving reason. (1)
6. The volume of air bubbles gradually increases as it rises up from the bottom of An aquarium.
a. Name and state the gas law that explains this phenomena. (2)
b.Can oxygen exist as a gas at -273.15º C. Write the significance of this temperature (2)
7 a. Calculate the eathalpy of formation of CO from C using the following data.
i) C + O2 􀃠 CO2, ΔH = -393.5 kj/mol.
ii) CO + ½ O2 􀃠 CO2, ΔH = 283 kj/mol (2)
8. Select the odd one out of the following set
a. Temparature, Pressure, Density (intensive property)
b. Human body , earth , water in a closed vessel (type of system)
c. Internal energy, work, enthalpy, entropy (state function) (3)
9. A redox reaction involves a simultaneous oxidation half reaction and a reduction half reaction
a. Write the electronic concept of oxidation and reduction: (1)
b. Identify the oxidising Agent and reducing agent in the following reaction.
Zn + CuSO4 􀃠 ZnSO4 + Cu (2)
10. A sample of hard water was found to lose its hardness on boiling. Explain the type of hardness.
(3)
11. a, K2CO3 cannot be prepared by solvay process. Why ?
(2)
b. A solution of Na2CO3 is alkaline. Why ? (2)
12. a, Graphite conduct electricity while diamond doesn’t Explain why?
(2)
b. Distinguish between silicons and silicates (2)
13. Hydrates of boron is called boranes. Discuss the structure and preparation of Diborane
(3)
14. Give the IUPAC name of
a. CH3 - CH2 – CH2 - CH2 – CH2 – COOH
b CH3 – CH – CH = CH2
CH3 (2)
15. Lassaignes’s test used to detect the N,P,S and X in organic compound. Discuss
The chemistry of Lassaigne’s test .
16. Addition of HBr to 3-methyl -1-butene yields a mixture of two alkyl bromides.
i. Write the structure of IUPAC name of those compounds. (2)
ii. Which is the major product in the reaction. Why ? (2)
17. Bayer’s test is used to detect unsaturation in organic compound ?
a. What is Bayer’s Reagent (1)
b. What is the product formed when ethylene treated with Bacyer’s regent. (2)

CHEMISTRY MODEL QUESTION PAPER

SET 4

1. When 2 g of H2 reacts with 32 g of O2 to form water. Hydrogen acts as limiting reagent.
a) What is a limiting reagent ? (1 Score)
b) Find the limiting reagent when 10 g of N2 reacts with 5g of H2. Find the mass of product
formed. Also find the limiting reagent (3 Scores)
OR
2. When sulphur reacts with oxygen two types oxides can be formed.
a) Explain which law of combination is applied here. (2 Scores)
b) Calculate the number of moles in the following.
i) 4g of CH4 ii) 12g of NaOH (2 Scores)
3. Chemical properties of an element is explained by its electronic configuration.
a) Give the electronic configuration of nitrogen. Name the principle behind this. (2 Scores)
b) Write the quantum number values of the valence electron of K. (1 Score)
c) What are the conclusions of Rutherford ‘s scattering experiment? (2 Scores)
4. The first ionization enthalpy value of group 13 elements are
B Al Ga In Tl
801 577 579 558 589
How would you explain this variation from the general trend? (3 Scores)
OR
5. Consider the following species
N3-,O2-, F-,Na+, Mg2+ and Al3+
a) What are iso electronic species? (1 Score)
b) Arrange the above species in the increasing order of their ionic radii ? (2 Scores)
6. Stability of a molecule can be explained by bond order.
a) Calculate the bond order of the following and discuss their stability.
i)He2 ii) O2
- (3 Scores)
b) Although geometries of NH3 and H2O molecules are distorted tetrahedral bond angle in
water is less than that of ammonia . Give reason. (2 Scores)
8. a) Calculate the standard enthalpy of formation of CH3OH(l) from the following data:
OR (3 Scores)
b) The reaction of cyanamide , NH2CN(s) ,with dioxygen was carried out in a bomb
calorimeter ,and ΔU was found to be – 742.7 KJ/mol at 298 K .Calculate the enthalpy
change for the reaction at 298 K.
NH2CN(g) + 3/2 O2(g) N2(g) + CO2 (g) + H2O(l) (3 Scores)
c) Give the relation between Gibbs energy change, enthalpy change and
temperature. (1 Score)
9. Blood is an example for buffer solution.
a) Explain the classification of buffer solution with suitable example (3 Scores)
b) Identify the conjugate acid – base pairs from the following reaction
(2 Scores)
c) Define PH of a solution (1 Score)
10. Redox reaction is one in which oxidation and reduction occurs simultaneously
a) Give an example for a redox reaction and Identify the oxidising and educing agent
(3 Scores)
b) Write the oxidation numbers of the under lined elements in the following.
i ) Mn O4
- ii) H2 S O4 (1 Score)
11. Heavy water is used in nuclear reactors.
a) Differentiate between ordinary water and heavy water. (1 1/2 Scores)
b) Classify the following hydrides
NH3, CaH2, CH4, NaH, NiH0.6- 0.7,LaH3 (1 1/2 Scores)
12. Gypsum and Plaster of Paris are Calcium sulphates.
a) How do they differ from each other. (1 Score)
b) Explain the preparation of plaster of paris (2 Scores)
13. Match the following.
A B C
Silicones B2H6 Water repellent
Borazine (R2SiO)n Cement
Silicates B3N3H6 Banana bond
Diborane SiO4
4- Inorganic benzene
(4 Scores)
14. Organic compounds exhibit isomerism
a) Give two conformational isomers of ethane (2 Scores)
OR
b) Give two stereo isomers of but-2-ene (2 Scores)
c) Give the IUPAC names of the following
i)
ii) (2 Scores)
d) How can you separate a mixture containing an orange and blue dye(2 Scores)
15. Complete the following reactions.
a) 2CH3CH2Br +2 Na ether
b) CH3CH2Br + Zn HCl
c) (3 Scores)
16. How are the following conversions carried out
i) Benzene to nitro benzene
ii) Butane to 1-bromo butane
iii) Ethanoic acid to methane (3 Scores)

CHEMISTRY MODEL QUESTION PAPER

SET 3

1 Copper oxide is obtained by heating copper carbonate or copper
nitrate contains Copper and Oxygen in the same ratio by weight
a) Which law is illustrated by this observation? 1
b) State the law. 2
2 a) Critical temperature of carbon dioxide and methane are
30.98 oC respectively. Which of these has strong intermolecular force
and why? 2
b) In terms of Charle’s, explain why -273 oC is the lowest possible
temperature. 2
3 a) Write the quantum numbers for the valence electrons of potassium
(19K). 3
b) Calculate the de Broglie wavelength of a body with mass 1 g
travelling at a velocity of 1.0 ms-1 2
c) State Heisenberg’s uncertainty principal. 2
4 The ionisation enthalpy increases from left to right in a period.
a) The ionisation enthalpy of Nitrogen and Oxygen is in the order
N > O. Why? 2
b) Arrange the following ions in the decreasing order of ionic radii.
Mg2+, N3-, F-, Na+, Al+, O2-. 3
5 a) Define bond order? 2
b) Ne2 molecule doesn’t exist. Why? 2
c) The shape of H2O molecule is bent. 2
6 Define entropy? 1
For the melting of ice at 25 oC, H2O (S)  H2O (l), The enthalpy of
fusion is 6.97 kJ mol-1 and entropy of fusion is 25.4 J mol-1K-1.
Calculate the Gibbs energy change and predict whether the process
is spontaneous or not at this temperature. 3
7 a) What are the conditions for getting maximum yield of ammonia?
Why? N2 + 3H2  2NH3 ΔH = -92.4kJ. 3
b) Classify the following compound as Lewis acids and bases.
FeCl3, BF3, NH3, Cl- 2
8 a) Assign oxidation number of the underlined elements
1. KMnO4 2. NaBH4 1
b) Justify that the following reaction is a redox reaction
CuO(S) + H2(g)  Cu(S) + H2O(g) 2
9 a) What causes the temporary and permanent hardness of water? 2
b) Explain one method for the removal of permanent hardness. 2
10 a) What is washing soda? How is it prepared? 3
b) Draw the structure of BeCl2 in vapour phase. 1
11 a) Classify the following oxides as neutral, acidic, basic or
amphoteric. CO, B2O3, SiO2, CO2, Al2O3 2
b) Give reasons.
1) Graphite is used as lubricant
2) Conc. HNO3 can be transported in aluminium containers. 2
12 a) Write the IUPAC name of the following.
1) Cl2CHCH2OH 2) CN
2
b) Which of the following carbocation is the most stable?
(CH3)3CC+H2, (CH3)3C+, CH3CH2C+H2, CH3C+HCH2CH3 1
c) Explain the chemistry of Dumas method. 1
13 a) Explain Markovnikov rule with suitable example. 3
b) Why benzene extra ordinarily stability though it contain 3 double
bonds? 2

CHEMISTRY MODEL QUESTION PAPER

SET 2

1. One gram mole of a substance contains 6.023 x 1023 molecules
a) Find out the number of molecules in 2.8 g of Nitrogen (1)
b) Which is heavier, one SO2 molecule or one CO2 molecule (1)
c) Under identical conditions of temperature and pressure, equal volume of
all gases contains equal number of molecules. Name the law (1)
d) An organic compound contain 52.2% Carbon, 13 % hydrogen and the rest Oxygen.
Find the empirical formulae of the compound (2)
2. a) The electronic configuration of an element with atomic number 7 is given below
1S2 2S2 2Px
2 2Py
1 2Pz
0
Do you agree with the above configuration. Justify (2)
b) Sketch the shape of S and P orbitals (1)
c) Write down the values of n, l, m and s for an electron in 3d orbital (1)
3. a) The properties of the elements are periodic functions of their atomic number.
Name the law. (1)
b) Which is bigger Cl or Cl- Why? (2)
4. a) Fill in the blanks (2)
Molecule
Hybridisation Shape
CH4 …………….. Tetrahedral
PCl5 SP3d ……………
BeF2 Sp ……………
………….. SP2 Trigonal Planar
b) Bond order gives an idea about the stability of the molecule. Calculate the bond order
of the following species and arrange them in the increasing order of bond length
O2, O2
+, O2
- (3)
OR
5. a) Using VSEPR theory explain the shape of Water molecule (2)
b) H2O is a liquid, while H2S is a gas a room temperature. Why? (1½ )
c) Which has higher dipolemoment NH3 or NF3? Why? (1½ )
6. a) Give vanderwaal’s equation and explain the terms. (2)
b) Arrange in the increasing order of viscosity
Honey, water, kerosene (1)
c) How is viscosity dependent on temperature (1)
7. a) Energy of an isolated system always remains constant.
Write the mathematical equation for the first law of thermodynamics (1)
b) Entropy of water is higher than that of ice. Give reason (1)
c) Classify the following as Extensive and Intensive properties
Temperature, Internal energy, density. Enthalpy (2)
8. a) PCl5 à PCl3 + Cl2 ΔH = negative.
What is the effect of temperature and pressure on the above equilibrium (2)
b) Write the conjugate acid – base pair
HCO3
-, HS- (2)
c) What happens when HCl gas is passed through a saturated solution of NaCl?
Which is the effect behind it? Define. (2)
9. a) Calculate the oxidation state of underlined atom
KMnO4, Cr2O7, H2S, NH3 (2)
b) Identify the oxidizing and reducing agent
CuS + O2 à Cu + SO2
c) In the above equation which has undergone oxidation and reduction (1)
10. a) Name the different types of Hydrides (1)
b) Name the isotopes of Hydrogen (1)
c) What is permanent hardness? How can it be removed? (2)
11. a) What are the similarities between Li and Mg? (2)
b) What is washing soda? How can it be prepared? (3)
12. a) What do you understand by (i) inert pair effect (ii) Catenation (2)
b) Explain the structure of Diborane (2)
13. a) Write the IUPAC names of the following compounds
(i) CH3 CO CH2 CH2 CH2 COOH
(ii) CH ≡ C ─ CH = CH ─ CH3 (2)
b) Name the test used (i) to detect the presence of Nitrogen in an organic compound (1)
(ii)to estimate Nitrogen in an organic compound. (1)
14. a) Complete the following (2)
(i) CH3 ─ CH = CH2 + HBr à ……………………………
(ii) 2CH3 ─ Cl + Na à ………… + …………….
b) Represent the two geometrical isomers of 2- butane (2)
c) How will you convert benzene to Nitro benzene (1)
15. a) What is photochemical smog? How can it be controlled? (1)
b) What is BOD ? (1)