HOLIDAY HOMEWORK

CLASS-XI

SCIENCE STREAM

Subject : Mathematics

Q.NO.1: Find the value of .

Q.NO.2: In a survey of 25 students , it was found that 15 had taken Maths ,

12 had taken Physics and 11 had taken Chemistry, 5 had taken

Maths and Chemistry , 9 had taken Maths and Physics , 4 had taken

Physics and Chemistry and 3 had taken all the three subjects. Find

the number of students that had taken

(a) only Chemistry

(b) Physics and Chemistry but not Maths

(c) only one of the subjects

(d) None of the subjects

Q.NO.3: Find the coordinates of the foot of perpendicular from the point

(–1, 3) to the line 3x – 4y – 16 = 0.

Q.NO.4: Find the square root of –5 + 12 i

Q.NO.5: Using principle of mathematical induction prove that

4n + 15n – 1 is divisible by 9 for all n ∈ N.

Q.NO.6: The 3rd, 4th and 5th terms in the expansion of (x + a)n

are respectively 84, 280 and 560, find the values of x, a and n.

Q.NO.7: The coefficients of (r – 1)th , r

th and (r + 1)

th terms in the expansion

of (x + 1)n are in the ratio 1 : 3 : 5. Find n and r.

Q.NO.8: Solve the following system of inequalities graphically :

Q.NO.9: The water acidity in a pool is considered normal when the average

PH reading of three daily measurements is between 7.2 and 7.8. If

the first two PH readings are 7.48 and 7.85, find the range of PH

)cot()cos()sec(

)cos()2(cos)2cos(

2

2

xxx

xxecx

+−+

+++

π

ππ

π

π

value for the third reading that will result in the acidity level being

normal.

Q.NO.10: While drilling a hole in the earth, it was found that the temperature

(T °C) at x km below the surface of the earth was given by

T = 30 + 25(x – 3), when

Between which depths will the temperature be between 200°C and

300°C?

Q.NO.12: Determine the number of terms in A.P. 3, 7, 11, ........ 407. Also,

find its 11th term from the end.

Q.NO.13: The sum of first three terms of a G.P. is 15 and sum of next three

terms is 120. Find the sum of first n terms.

Q.NO.14: Find two positive numbers whose difference is 12 and whose

arithmetic mean exceeds the geometric mean by 2.

Q.NO.15: Show that the coefficient of middle term in the expansion of

(1 + x)20

is equal to the sum of the coefficients of two middle terms

in the expansion of (1 + x)19

Q.NO.16: Show that the coefficient of x5 in the expansion of product

(1 + 2x)6 (1 – x)

7 is 171.

Q.NO.17: If the image of the point (3, 8) in the line px + 3y – 7 = 0 is the

point (–1, –4), then find the value of p.

Q.NO.18: Find the distance of the point (3,2) from the straight line whose

slope is 5 and is passing through the point of intersection of lines

x + 2y = 5 and x – 3y + 5 = 0

ECONOMICS

Q1.What do we learn from the development experiences of our neighbours

(China & Pakistan). Make a comparative study of India, Pakistan and China

highlighting on the following points:

Demographic indicators

Growth indicators

Human Development indicators

Q2. What was the situation of Indian economy before & after 1991? Highlight

the importance of NEP,1991.

Q3. In developed countries, salaries are higher than in underdeveloped

countries because workers are more

productive. Do you agree with this statement? Write your observations using

your knowledge of the relationship between human capital formation &

productivity.

Q4. Given the fact that organic farming offers lower yield than conventional

farming, should it be promoted in our country where millions of people are not

getting enough to eat? Write your observations.

Q5. In context of OTBA answer the following questions:

a) How crisis of mid 1960 change the parameters of Indian agriculture?

(Second Green Revolution)

b) Why should agricultural processing industries be an integral part of the

second green revolution?

c) Why developing countries is most preferred destination for medical

tourism?

d) Is it correct to state that development of Medical tourism has led to the

development of many other trades? Justify your strand.

Physics

Q1) Explain the construction and various operations for Carnot’s heat engine

working between two temperatures. Hence derive the efficiency of the engine.

Q2) Describe the construction of a refrigerator and obtain the expression for its

coefficient of performance.

Q3) Define isothermal and adiabatic processes. Derive an expression for work

done during isothermal process.

Q4) A Carnot refrigerator takes 6 × 104 cal from a freezing chamber at 250 K

and rejects heat at 300 K. How much work must be done? How many calories

are rejected?

Q5) Derive ascent formula for the rise of liquid in a capillary tube and discuss

the result obtained.

Q6) State and prove Bernoulli’s theorem for fluids and give the assumptions

used in deriving it.

Q7) Two equal drops of water are falling through air with a steady velocity of

0.1 ms-1

. If drops combine to form a single drop, what will be new terminal

velocity?

Q8) A liquid is kept in a cylindrical vessel which is rotated along its axis. If the

radius of vessel is 0.05 m and the speed of the rotation is 2 rev/s, find the

difference in height of the liquid at the centre of the vessel and its sides.

Q9) Explain surface tension and surface energy. Also establish the relation

between them.

Q10) Define angle of contact. Where the angle of contact is is obtuse, acute or

zero degree.

Q11) If a man is sitting in a boat which is floating in a pond. If the man drinks

some water from the pond, what will happen to the level of water in the pond?

Q12) Show that there is an excess of pressure on curved surface of liquid, which

is more on concave face than that on convex face of curved surface of liquid.

Q13) Explain Torricelli’s experiment to study the atmospheric pressure.

Q14) Write a note on venturimeter.

Q15) Calculate the difference between two principle specific heat of 1 gram of

helium gas at N.T.P. Molecular weight of helium = 4 and J = 4.186 J cal-1

and R

= 8.31 J mol-1

K-1

.

* Revise N.C.E.R.T. part (I) and test will be conducted on 17th

January

2014.

HINDUSTANI VOCAL MUSIC

****

A. Theory:

1. Learn definition of the following:-

That, Jati, Swarmalika, Tarana, Nibaddha and Anibaddhagana.

2. Learn description of the following ragas:

Bhupali, jaunpuri and vrindabani Sarang

3. Write about contribution and short life sketch of Tansen, and Pt. Vishnu

Digambar Paluskar.

4. Write brief history of Dhrupad and Gharana.

ENGLISH

1-Long Reading Text-

Answer the following questions in about 150 words each

a. With the selection of name, what, larger quest was Booker attempting to

fulfill and how did having a name relate to this universal quest ?

b. Why did Washington feel that the Reconstruction Policy was artificial and

forced ?

c. Compare and contrast the educational principles of Hampton and

Washington .

d .Why did Washington despise working in a coal mine ?

2-WRITING SKILLS-

Q 5.You are Anil /Anila, a social activist and a ‘Wildlife Protection Week’ is

being observed in your city .

Design a poster to create awareness about the need for wildlife protection.

3- PROJECT-----

Make a short power point presentation on the life of Washington .T . Booker .

BIOLOGY

I. Prepare a glossary of terms from the chapter “Morphology of flowering

plants”, on A4 size sheets.

II. Revise the following chapters and answer the questions given below:

a) Anatomy of flowering plants

b) Respiration in plants

QUESTIONS:

1. Describe the stomatal apparatus and list the functions performed by the

Same.

2. Draw labeled diagrams and discuss the composition of xylem and

phloem

3. Give the location and function of the following:

a) Casparian strip

b) Starch sheath

c) Bulliform cells

d) Lenticels

4. Distinguish between:

a) Heartwood and sapwood

b) Spring wood and autumn wood

c) Cork and bark

5) Explain the process of secondary growth in the stems of woody

Angiosperms with the help of labeled diagrams. Also comment upon its

significance.

6. What are the crucial events in aerobic respiration? List and explain.

7. What is the significance of stepwise release of energy in respiration?

8. What is RQ? Give its value for carbohydrates, proteins and fats.

9. What is an amphibolic pathway? Can respiration be considered as one? Give

reasons.

10. Elucidate the major pathways of anaerobic respiration with the help of flow

diagrams.

III. Answer the following with reference to the case study(OTBA) “Incredible

India”:

1) Enlist the varied reasons for biodiversity loss and comment upon its

consequences.

2) Develop a dichotomous key to present an example of classification by

taking animals

explained in the text into account.

3) How would you justify the declaration of the Western Ghats as

hotspots of

Biodiversity by Norman Meyers.

4) List the characteristic features of the plants of the Lauraceae family.

5) Interdependence among living organisms is explicitly visualized in the

North Western

Ghats mountain ranges. Explain taking an example from text.

COMPUTER SCIENCE

Q1. Find the output of following code segment:

#include<iostream.h>

int func(int &x, int y = 10)

{

if ( x % y == 0) return ++x; else return y--;

}

void main()

{

int p = 20, q = 23;

q = func (p,q);

cout<<p<<q<<endl;

p = func(q);

cout<<p<<q<<endl;

q = func(p);

cout<<p<<q<<endl;

}

Q2. Find the output of following code segment:

#include <iostream.h>

#include <conio.h>

#include <ctype.h>

#include <stdio.h>

void main()

{

char str[80];

int i, vc= 0, dc = 0, ot = 0;

clrscr();

cout << "\n\tEnter any string –> ";

gets(str);

i = 0;

while (str[i] != '\0')

{

str[i] = tolower(str[i]);

if (((str[i] == 'a')) || ((str[i] == 'e')) || ((str[i] == 'o')) || ((str[i] ==

'u')))

vc++;

else

if ((str[i] >= '0') && (str[i] <= '9'))

dc++;

else

ot++;

i++;

}

cout << "\n\tNumber of vowels are : " << vc;

cout << "\n\tNumber of digits are : " << dc;

cout << "\n\tNumber of other characters are : " << ot;

}

Q3. Write a function to calculate sum of even numbers from 2 to 40 using

while loop.

Q4. Write a function to calculate the sum of following series:

!!3!2!1

321

n

xxxxn

−−−−−−−++

Q5. WAP with the help of user defined functions to perform following

operations using switch case: (create function CUBE(), CONE(),

CYLINDER()and invoke them in switch case.)

4

TOTAL SURFACE AREA CALCULATOR

1. CUBE

2. CONE

3. CYLINDER

4. EXIT

Q6. Write a function to calculate the sum of following series:

!2!6!4!2

321

n

xxxxn

−−−−−−−++

Q7. Write a function to calculate the sum of following series:

)!2(!5!4!3

321

+

−−−−−−−++

n

xxxxn

Q8. Write a function to calculate the sum of following series:

!!6!4!2

21284

n

xxxxn

−−−−−−−++

Q9. Find out the size in bytes and number of elements of following arrays:

• float MARKS[20];

• double SALE[5][6];

• char SUBJECT[30];

Q10. Write a function to convert a string to the uppercase.

Q11. Write a function SUM_HALF() to calculate sum of values below the

diagonal including

diagonal values. For e.g

10 40 60

60 57 80

70 50 20

Sum of 10,60,57,70,50,20

Q12. Write a program to accept values for 3X3 array. Write a function to

calculate the sum

of first diagonal and second diagonal values separately. Array would be

passed as

parameter.

Q13. Convert:

1. (453.78)10 to Binary Number

2. (163)8 to Hexa Decimal

3. (111000.1101)2 to Octel

4. (567AC)16 to Decimal

5. (76AB13) 16 to Binary

Q14. Write a function to count the number of ‘A’ or ‘a’ letters present in the

string,

without using strlen() function.

Q15. Explain type casting with example.

Q16. What will be the possible output of the following function

void Rprint()

{

randomise( );

int x=random(2)+1;

for(int i=0;i<=x;i++)

cout<<i+2<<”,”;

}

(i) 0,1,2,3,4,,5

(ii) 1,2,3,4,5

(iii) 2,3,4,

(iv) 2,3,4,5,6,

Q17. Convert following while loop into for loop:-

a=1;

b=10;

i=1;

while(i<10)

{

c=a+b;

i++;

}

Q18. Write a user defined function search( ) which takes three parameters an

integer array, size of array and element to be searched. Function will return

position of the element if the element is found and 0 if not found.

Example:-

Array {2,4,8,11,23,45,67,78,90}

Element to search 11

Function should return 4

Revise the whole syllabus from April to December.

CHEMISTRY

Q1 Do all the questions of unit test paper in your class work notebook.

Q2 Read the Chapter- Environmental Chemistry and prepare it for a class

test.

Q3 Do the following assignment based on the chapters- Hydrogen & s-

block elements.

Assignment

Q1 What do you mean by Syn gas? How will you prepare it by Coal

gasification process?

Q2 Explain ionic, covalent and metallic hydrides with an example of each.

Q3 Why do covalent compounds like alcohol and carbohydrates dissolve in

water?

Q4 Why density of ice is less than water? Explain.

Q5 What is Autoprotolysis of water? What is its significance?

Q6 What causes the temporary and permanent hardness of water? Discuss

the principle and method of softening hard water by ion exchange reaction.

Q7 Write down the chemical reactions to show that hydrogen peroxide can

function as an oxidizing as well as reducing agent in both acidic and basic

medium.

Q8 What happens when hydrogen peroxide is exposed to light?

Q9 Li has maximum degree of hydration enthalpy. Give reason.

Q10 Explain why alkali and alkaline earth metals impart colour to the

flame?

Q11 Why Li is the strongest reducing agent?

Q12 Discuss the anomalous behavior of Li & Be.

Q13 Why Li and Mg show diagonal relationship with each other?

Q14 Write down all the reactions for the preparation of Washing Soda.

Q15 Give reactions to show the amphoteric nature of beryllium hydroxide.

Q16 Write down the equations for the preparation of quick lime, slaked

lime and plaster of paris.

HAPPY HOLIDAYS ☺

Subject : Chemistry

Chapter : Organic Chemistry

Class : XI - B

1. Do the chemistry Assignment &Revise Chapter- 12