SALWAN PUBLIC SCHOOL, TRANS DELHI SIGNATURE CITY

CLASS-XI SCIENCE

HOLIDAY HOMEWORK (2017-18)

NOTE: 1. Homework to be attempted in homework copy.

2. Revise for forthcoming exams, all topics covered till 31st May 2017.

ENGLISH

1. Read the novel Canterville Ghost by Oscar Wilde. Draw a Mind Map focusing on the

storyline and write a book review in your own words. (125-150 words)

2. Write a letter to the Director of Postal Services complaining about the absence of a

post office in your town. Mention how this has created difficulties for anyone who

wants to avail of the facilities offered by the postal department. You are Arjun/ Arti of

Aravali town. (150 words)

3. Write an article for your school magazine on the topic Time and Tide Wait for None.

(120-150 words)

4. You are Rajan / Rachna, the Secretary of the Debating Society of your school, St.

Loreto Convent, Darjeeling. Write a notice informing students about an inter school

debate. The motion for the debate is, 'Co-education does more good than harm'.

Mention all pertinent details in the notice. (50-60 words)

5. The Resident's Welfare Association of Saral Apartments, Pune is starting Yoga and

Laughter Club. The inauguration is on Sunday, September 12. Write a notice inviting

residents to the inauguration. Also mention the activities that the Club will undertake.

(50-60 words)

6. You are Kavita / Kailash staying at B-101, Yamuna Vihar, Delhi. You find it disturbing

that despite a ban on the use of polythene bags, its use is rampant in city. Write a

letter to the editor of a National Daily expressing your concern about the apathy of

people towards environmental degradation. Also suggest ways to mobilize city

dwellers for the cause of safe environment with the help of School Children. (125-

150 words)

PHYSICS

HOTS AND APPLICATION BASED QUESTIONS

1. In the equation y = a sin (ωt - kx), and x stand for time and distance respectively.

Obtain the dimensional formula for ω and k.

2. The rate of flow (V) of a liquid flowing through a pipe of radius r and a pressure

gradient (P/ℓ) is given by Poiseuille’s equation:

3. The frequency ‘υ’ of vibration of a stretched string depends upon its length ‘L’, its

mass per unit length ‘m’ and the tension ‘T’ in the string. Obtain dimensionally an

expression for frequency ‘υ’.

4. Reynolds number NR (a dimensionless quantity) determines the condition of

laminar flow of a viscous liquid through a pipe. NR is a function of the density of the

liquid ‘ρ’, its average speed ‘v’ and coefficient of viscosity ‘η’. Given that NR is also

directly proportional to ‘D’ (the diameter of the pipe), show from dimensional

considerations that NR = ρ.v.D/ η

5. The frequency ‘υ’ of an oscillating drop may depend upon radius ‘r’ of the drop,

density ‘ρ’ of the liquid and surface tension ‘S’ of the liquid. Establish an expression

frequency ‘υ’ dimensionally.

6. What do you mean by error in a measurement? Briefly explain the different types of

errors and their causes. How can these errors be minimized?

7. Distinguish between the terms precision and accuracy of a measurement

8. The diameter of a wire as measured by a screw gauge was found to be 0.026 cm,

0.028 cm, 0.029 cm, 0.027 cm, 0.024 cm and 0.027 cm. Calculate (i) mean value of

the diameter (ii) mean absolute error (iii) relative error (iv) percentage error.

Also express the result in terms of absolute error and percentage error.

[Ans. (1) 0.027 cm (ii) 0.001 cm (iii) 0.037 (iv) 3.7%; (0.027 ± 0.001) cm, (0.027 +

3.7%) cm]

9. The error in the measurement of radius of a sphere is 2%. What would be the error

in the volume of the sphere? [Ans 6%]

10. For the estimation of Young’s modulus for the specimen of a wire, following

observations were recorded L= 2.890, M= 3.00, d= 0.082, g= 9.81, ℓ= 0.087.

Calculate the maximum percentage error in the value of Y and mention which

physical quantity causes maximum error.

11. The radius of the sun is 696,000,000 m. Express it in scientific notation (in powers

of 10).

12. Using the method of dimensions, derive an expression for the energy of a body

executing SHM; assuming this energy depends upon its mass ‘m’, frequency ‘υ’ and

amplitude of vibration ‘r’.

13. A man starts from his home at 8:00 am to his office. He walks with a speed of 2 m/s

on a road up to his office 3.0 km away from his home. He stays in the office up to

4:00 pm and returns to his home by bus, which moves with a speed of 10 m/s.

Calculate (i) the time taken by man to reach his office and (ii) time taken by the man

to reach his home. Also plot (x - t) graph of his motion. [Ans.(i) 25 minute (ii) 5

minute]

14. A Car Covers The First One Third Of A Distance x At A Speed Of 10 Km/H, The

Second One Third At A Speed Of 20 Km/h And The Last One Third At A Speed Of

60 Km/H. Determine The Average Speed Of The Car Over The Entire Distance x.

[Ans. 18 km/h]

15. From the top of a tower a ball is dropped to fall freely under gravity and at the same

time, another ball is thrown up with a velocity of 50 m/s. Plot the position – time

graph for the motion of the two balls during the time interval t=0 to t=5s. Take

g=10ms-2.

16. A rocket is fired vertically and ascends with a constant vertical acceleration. In the

duration of 5 s, it attains an upward velocity of 150 m/s. After 5 s, its engine stops

functioning and rocket continues to move as a free particle and finally returns on

the earth. From the velocity time graph of the rocket, calculate (i) the height reached

by the rocket during the period of burning of fuel (g=10ms-2); (ii) maximum height

reached by the rocket and (iii) the acceleration of the rocket During the period of fuel

burning. [Ans.(i)375 m (ii)1500 m (iii) 30 m/s]

17. A body leaving a certain point O moves with acceleration, which is constant in

magnitude and direction. At the end of the fifth second, its velocity is 1.5 m/s. At the

end of the sixth second, the body stops and then begins to move backwards. (i)

Find the distance traveled by the body, before it stops. (ii) Determine the

velocity with which the body returns to point O. [Ans. (i) 27 m (ii) 9 m/s]

18. Two trains each of length 100 m, moving in opposite directions along parallel lines,

meet with their speeds 60km/h and 30km/h. If their accelerations are 0.3 ms-2 and

0.2 ms-2 respectively, find the time taken by them to pass each other. [Ans. 7.44 s]

19. A bus is moving with a speed of 10 m/s on a straight road. A scooterist wishes to

overtake the bus in 100s. If the bus is at a distance of 1 Km from the scooterist, with

what speed should the scooterist chase the bus? [Ans. 20 m/s]

20. A boat which has a speed of 5 km/h in still water crosses a river of width 1 km along

the shortest possible path in 15 minute. Find the velocity of the river water in km/h.

[Ans. 3 km/h]

21. A ball is thrown vertically upward. It has a speed of 10 m/s, when it has reached one

half of its maximum height. How high does the ball rise? Take g = 10ms-2. [Ans. 10

m]

22. Three different objects of masses m1, m2, and m3 are allowed to fall from rest and

from the same point O along three different friction-less paths. Find the ratio of the

speeds of the three objects, on reaching the ground. [Ans. 1: 1: 1 ]

23. A car travels 6 km towards north at an angle of 450 to the east and then travels

distance of 4 km towards north at an angle 1350 to the east. How far is the point

from the starting point? What angle does the straight line joining its initial and final

positions make with the east?

24. Find angle between two vectors of magnitudes 12 and 18 units, when their resultant

is 24 units.

25. Point P, Q and R are in a vertical line such that PQ = QR. A ball at P is allowed to

fall freely. What is the ratio of the times of descent through PQ and QR?

26. A ball is release from the top of a tower of height h meter. It takes T seconds to

reach the ground. What is the position of the ball in T/3 seconds?

CHEMISTRY

1. Insulin contains 3.2% of sulphur , calculate molar mass of insulin.

2. Commercial available con.HCl contain 38% HCl by mass. What is the molarity of this

solution ? The density of solution is 1.19gcm-3.

3.Calculate the molarity of NaOH in the solution prepared by dissolving its 4 g in enough

water to form 250 ml of the solution.

4. Chlorine is prepare in the laboratory by treating MnO2 with aqueous HCl according to

the reaction

4 HCl + MnO2 ------------ 2 H2O + MnCl2 + Cl2

How many gram of HCl react with 5.0 g of MnO2.

5. Calculate the volume of O2 at STP liberated by heating 12.25 of KClO3

6. The density of 3M solution of NaCl is 1.25 gm/ml. Calculate the molality of the

solution

7. What is the limiting reagent ? Find the limiting reagent in the following reaction when

5 kg of N2 react with 10kg of H2

N2 + 3H2 --------- 2 NH3

8. Calculate the average atomic mass of chlorine using following data

% of natural abundance Molar mass

35Cl

37Cl

75.77

24.23

34.9689

36.9659

9. Which one of the following will have the largest number of atom?

i) 1 gm Au (ii) 1 gm of Na (iii) 1 gm of Ag

10. Phosphrous decomposes into phosphrous and dihydrogen.What will be change in

volume when 100ml of phosphine is decomposed?

11. Two friends riya and Pooja were discussing that which is better for expressing the

concentration of a solution. MOLALITY or MOLARITY? Pooja told riya that molality is

considered better for expressing the concentration as compared to the molarity and

explained the reason as well.

(i) What would be the explanation of Pooja.

(ii) What are the units of molarity and molality

(iii) What is the difference between molality and molarity.

12. Which of the following is isoelectronic (having same number of electrone)

Mg2+ , O2- , Na+

13. (a)Explain discharge tube experiment. What will be the value of E/M ratio if nature

of gas is change.

(b) A wave has frequency 2x 1015. Find its wave length and wave number.

14. Compute the mass of one molecule and the molecular mass of C6H6 (benzene)

(at. Mass of C=12, H=1 u).

15. An organometallic compound on analysis was found to contain, C=64.4%, H=5.5%

and Fe = 29.9%. Determine its empirical formula (At. Mass of Fe = 56 u).

16. Calculate the number of grams of oxygen in 0.10 mol of Na2CO3.10H2O.

17. How many grams of Cl2 are required to completely react with 0.4 g of H2 to yield

HCl ? Also, calculate the amount of HCl formed.

18. In three moles of ethane (C2H6), calculate the following:

(i) Number of moles of carbon atoms.

(ii) Number of moles of hydrogen atoms.

(iii) Number of molecules of ethane.

19. (i) Name the model of atom propose by Rutherford.

(ii) Mention the main feature of the atomic model propose by Rutherford .

(iii) Write the value associated with the Rutherford model of atom

20. Calculate the mass of sodium acetate (CH3COONa) required to make 500 ml of

0.375 molar aqueous solution. Molar mass of sodium acetate is 82.045 g/mol.

MATHEMATICS

1. Let A = {1, 2, 3, ..........., 45} & R be the relation “is square of” in A. Write R as a

Subset of A x A.

a. Also find the domain & Range of R.

2. Let A = {2, 3, 5, 7, 10}. Show that the relation

(a) R1 defined as “is equal to” is an identity relation.

(b) R2 defined as “is cube of” is a Void relation.

(c) (c)R3 defined as “difference is an integer” is an Universal relation.

Determine the domain & Range of the following relations:

(d) R1 = {(x, x): x is a prime number less than 15}

(e) R = {(4x –3, 1 –x): x < 5, x ε N}

(f) R= {(x, x3–x): x < 5, x ε W}

3. Find the domain & range of the following questions:

f (x) = (b) f(x) = ( C) f(x) = (d) f(x) = 6x + 7 (e) f(x) = Let A = {1,2,3,4}, B =

{1,4,9,16,25} and R be a relation defined from A to B as, R = {(x, y) : x Î A, y

a. Î B and y = x2}(a) Depict this relation using arrow diagram.(b) Find domain of

R. (c) Find

b. range of R. (d) Write co-domain of R.

4. Find the domain and range of, f(x) = |2x –3| –3

5. Find the domain and range of the following relations.

a. R = {(x, y): x ∈N, y ∈N and x +y = 10}

b. R = {(x, y): x, y ∈N, x2+ y2 ≤20} in each of the above cases verify that R-1= R.

6. If f(x+1) =3x+7, find f (3x)-f(x)

7. Find the domain and range of f(x) = │x+2│

8. If f(x) =, prove that (f(x)) 3= f(x3) + 3 f (Find A U B, A ∩ B, A -B, A ∩ (B -C), (A U

C)’and (B ∩ C)’U A in each of the following:

i. U = {1, 2, 5, 7, 8, 9}, A = {2, 5, 9}, B = {5, 8, 9}, C = {1, 2, 5, 8}

ii. U = {set of all natural numbers}, A = {Set of all multiples of 2},

iii. B = {Set of all multiples of 5} and C = {Set of all multiples of 10}

iv. U = {set of all even numbers}, A = {Set of all multiples of 2},

v. B = {Set of all multiples of 4} and C = {Set of all multiples of 8}

9. In a survey of 700 students in a college 180 like Coke, 275 like Pepsi & 95 like both.

Find how many of them like neither Pepsi nor Coke?

10. If A & B are two sets & U is the universal set such that n (A) = 100, n (B) = 200, n (U)

= 500 & n(A∩B) = 50,find n(A’ ∩ B’ ), n(A’ ∩ B ) & n(A ∩ B’).

11. In a class of 60 students, 23 play Hockey, 15 play Basketball & 20 play cricket. 7

play Hockey &Basket-ball, `10 play Cricket & Basket-ball, 4 play Hockey & Cricket &

15 Students do not play any of these games. Find

a. How many play Hockey, Basket-Ball & Cricket.

b. How many play Hockey but not cricket. (c)How many play Hockey & Cricket

but not Basket-ball.

c. In a class of 25 students, it was found that 15 had taken Physics, 12 had

taken Chemistry & 11 had taken Biology, 5 had taken Physics & Biology, 9

had taken Physics & Chemistry, 4 had taken Biology & Chemistry &3 had

taken all the three subjects. Find the numbers of students that had (a)Only

Physics(b)Only Chemistry (c)Physics & Chemistry but Not Biology (d) Biology

& Physics but not Chemistry (e) only one of the subjects (f) At least One of

the three subjects (g) none of the three subjects.

12. 16 of the students in a certain class, 10 had taken a course in A, 11 had taken a

course in B, and 14 had taken a course in C. If 3 students had taken a course in all

of the A, B, and C, and 20 students had taken a course In only one of A, B, and C,

how many students had taken a course in exactly two of A, B, and C?

13. 17. If A and B are two sets such that n (A) = 150, n (B) = 250 and n (A ∪B) = 300.

Find n (A –B) and n(B –A).

14. 18. If A & B be two sets containing 12 & 27 distinct element respectively, what can

be the minimum number of elements in AUB? Find also the maximum number of

elements in AUB?

15. From 50 students taking examination in Mathematics, Physics and Chemistry, each

of the student has passed in at least one the subjects, 37 passed Mathematics, 24

Physics and 43 Chemistry. At most 19 passed Mathematics and Physics, at most 29

Mathematics and Chemistry and at most 20 Physics and Chemistry. What is the

largest possible number that could have passed in all 3 subjects?

16. In a University, out of 100 students 15 offered Mathematics only , 12 offered

Statistics only , 8 offered physics Only , 40 offered Physics and Mathematics , 20

offered Physics and Statistics, 10 offered Mathematics and statistics. 65 offered

Physics. Find the number of students who did not offer any of the 3 subjects.

17. In an examination, 80% students passed Mathematics, 72% passed in Science and

13% failed in both the subjects. If 312 students passed in both the subjects, find the

total number of students who appeared in the examination.

18. Two finite sets have a & b elements. The total number of subsets of the first set is 56

more than the total number of subsets of the second set. Find the value of a & b

19. A and B are two sets containing respectively m1 and m2 elements. If x ≤n (A∪B) ≤y,

find x and y.

20. The perimeter of a certain sector of a circle is equal to the length of the arc of a

21. Semi-circle having the same radius, express the angle of the sector in degrees,

minutes & seconds.

22. Find all the angles between 0o & 360o which satisfy the equation Sin2 θ = ¾.

23. If Sin A = 1/√10, Sin B = 1/√5 (A & B being Positive acute angles), Show that A + B =

Π/4. Find the Value of each of the following:

(a)Sin 105o (b) Cos 15o (c) Tan 75o (d) Sin 22 ½ (e) Cos 7 ½

24. Prove that:

(a)Tan 5A –Tan 3A –Tan 2A = Tan 5A.Tan 3A.Tan 2A

(b)Tan 7A –Tan 4A –Tan 3A = Tan 7A.Tan 4A.Tan 3A

(c)Tan 70o = 2 Tan 50o + Tan 20o

(d)Cos 52o + Cos 68o + Cos 172o = 0

(e)Sin A. Sin (60o –A). Sin (60o + A) = ¼ Sin 3A

25. Find the general solution of the equation:

(a) Sec x –tan x = √3

(b) Cosec2x = 2 Cot x

(c) Sin2x –2Cos x + ¼ = 0

(d) 2Sin2x + √3 Cos x + 1 = 0

(e) Cos2x –Sin x.Cos x –Sin 2x = 1

(f) tan x + tan 2x + tan x. tan 2x = 1

(g) Cos 3x + 8Cos3 x = 0

(h) √3 Sinx + Cos x = √2

(i) Tan x + Sec x = √3

(j) Cot2x + 3 Cosec x + 3 = 0

26. Prove that :

( a) Cos 200.Cos 300.Cos 400.Cos 800= √3/16

(b) Sin 100.Sin 500.Sin 600.Sin 700= √3/16

(c) Tan 200.Tan 400.Tan 600.Tan 800= 3

BIOLOGY

1.Name the phyla that show following features.

a. The multicellular animals with only cellular level of organization.

b. with only tissue level of organization.

c. with only organ level of organization.

d. with organ system grade of organization.

2. Differentiate the following.

a. Asymmetry, Radial and Bilateral symmetry.

b. Diploblastic and Triploblastic organisms.

c. Open and Closed circulatory system

d. Acoelomata, Pseudocoelomata and Coelomata.

3. What is Metamerism? In which animals it is seen?

4. Write the general features of phylum Porifera.

5. What is the significance of canal system in sponges?

6. Write the general features of Cnidaria and Ctenophora.

7. What is Metagenesis? Explain with reference to the example you have studied.

8. Differentiate polyp from medusa.

9. What is Bioluminescence?

10. Write the general features of phylum Platyhelmenthes and Aschelmenthes.

11. With which organism the following organelles are associated? Mention

their functions.

a. Flame cells b. Nephridia c. Parapodia d. Malphigbian tubules e. Trachea

f. Foot g. Tube feet h. Cnidoblasts i. Radula

12. Write the general features of phylum Annelida and Arthropoda.

13. Differentiate the following

i. Monoecious and Dioecious

ii. Direct and Indirect development.

iii. Oviparous and Viviparous.

14. Write the general features of Echinodermata and Hemichordata.

15. What are the three fundamental features of all chordates?

16. Write the differences between Chordates and Nonchordates.

17. Write the general features of Cyclostomes.

18. Differentiate the following

(i) Cartilaginous fishes and Bony fishes.

(ii) Poikilothermy and Homiothermy

19. Write the general features of class Amphibia and Reptilia.

20. Write the general features of class Aves and Mammalia.

COMPUTER SCIENCE

Develop C++ programs to accomplish the following tasks:

1. To find the factorial of a number entered by user.

2. Check whether the entered number is an Armstrong Number or not.

3. To generate Reverse of a number entered by user .For example 2396 should get

printed as 6932.

4. To find the Sum of individual digits of a 4 digit number entered by user.

5. Print the series of factorials of natural numbers up to n.

6. Print the series of Prime numbers up to n.

7. WAP to find the LCM and HCF of 2 numbers.

8. Write a program that allows the user to enter the grade scored in a programming

class (0-100). If the user scored a 100 then notify the user that they got a perfect

score. Modify the program so that if the user scored a 90-100 it informs the user that

they scored an A. Modify the program so that it will notify the user of their letter

grade

0-59 F , 60-69 D , 70-79 C , 80-89 B , 90-100 A

9. Write a program that continues to asks the user to enter any number other than

5 until the user enters the number 5. Then tell the user "Hey! you weren't

supposed to enter 5!" and exit the program.

HIGH ORDER THINKING SKILL QUESTIONS

10. Write a program that presents the user w/ a choice of your 5 favorite beverages

(Coke, Water, Sprite, Whatever).Then allow the user to choose a beverage by

entering a number 1-5.Output which beverage they chose.

11. Write a program that asks the user to enter the number of pancakes eaten for

breakfast by 10 different people (Person 1, Person 2, … Person 10). Once the

data has been entered the program must analyze the data and output which

person ate the most pancakes for breakfast.

- Modify the program so that it also outputs which person ate the least number of

pancakes for breakfast.

- Modify the program so that it outputs a list in order of number of pancakes

eaten of all 10 people. i.e.

Person 4: ate 10 pancakes

Person 3: ate 7 pancakes

Person 8: ate 4 pancakes

...

Person 5: ate 0 pancakes

12. Write a C++ program to print table a given number.

PHYSICAL EDUCATION

1.Write notes (Including objectives) of the following:

a)NSNIS (Netaji Subhash National Institute of Sports)

b) SAI (Sports Authority of India)

c) All India council of sports

d) Central Advisory Board of Physical Education and recreation

2. Describe the Special Olympic Bharat. Write down the mission, vision and

achievements.

3. Name the careers available in the field physical education in India. Write in details.

4. Write down the sports journalism career in detail.

5. Explain about award in details?

a Arjun Award b. Dronacharya Award

c. Rajiv Gandhi Khel Ratna Award d. Chacha Nehru Sports Award

6. Define Physical education. Its aim of Physical Education?

7. What is the aim of CBSE sports?

8. Discuss the main function of IOC?

9. Briefly explain the concept of adapted and integrated physical education.

10. Elucidate the importance of physical fitness and wellness in brief?

11. What is endurance and discuss its type in brief’?

12. Write short note in brief on the following:

1) Olympic Motto 2) Olympic Flame 3) Olympic Flag

12.Define physical education and explain its aim and objectives in details?

13.Explain the health related and administration related careers in details?

14.Do the components of positive lifestyle help in leading a healthy life? Discuss in

details.

15. “The proper knowledge of anatomy and physiology is very significant in the field of

sports”. Explain your views 200 words on this statement.