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NPS INTERNATIONAL SCHOOL, GUWAHATI

SUMMER HOLIDAY ASSIGNMENT

GRADE: XI C & D (NON COACHING)

ENGLISH

1. Read the newspaper and cut and paste samples of the following in your Holiday homework copy

a. Classified advertisement – Situation Vacant, Situation Wanted

b. Commercial advertisement

2. Comfort Garments wish to announce their Annual Clearance before Durga Puja. Construct a suitable

Display Advertisement for them in 50 words.

3. Design a poster on SAVE THE EARTH on behalf of the Pollution Board, Guwahati in 50 words.

4. Write a letter to the Editor of a local newspaper expressing your views on how the standard of

performance in sports can be improved in India. Write the letter in 120-150 words.

5. Write a letter of Complaint to the Manager of M/s R. K. Appliances, Central Market Raipur on the defects

of a recently bought Dish Washer. Write the letter in 120-150 words.

6. A book review describes, analyses and evaluates. The review conveys an opinion, supporting it with

evidence from the book.

Read a book from the Suggested List of authors given below and write its review in about 200-250 words.

a. Dan Brown

b. Sid Bahri

c. John Green

d. Markus Zusak

e. Any other author of your choice

Writing the review

Include title, author, publisher, publication date, edition, pages etc.

Points to ponder:

*What was the story about?

*W ho were the main characters?

*Were the characters credible? Give reasons

*Who was your favourite character?

*Could you relate yourself to any of the characters in the story?

*Do you recommend the book to others?

*Should a first time reader, read the book that you are reviewing? Why?

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PHYSICS

Solve the following chapter wise questions.

CHAPTER 2 : UNITS AND MEASUREMENT

i. Check by the method of dimensions whether the given equations is correct:

Pv

, where

v is velocity of sound, P is pressure and ρ is density of the medium.

ii. A gas bubble , from an explosion under water, oscillates with a period T proportional to

cba EdP , where P is the static pressure, d is the density of water and E is the total energy

of the explosion. Find the values of a, b and c.

iii. The length of a rod as measured in an experiment was found to be 2.48 m , 2.46 m ,

2.49 m , 2.50 m , and 2.48 m . Find the average length and the percentage error.

iv. The length , breadth and thickness of a cuboidal block are Length = (15.12±0.01)𝑐𝑚

breadth = (10.15 0.001)cm thickness =( 5.28 0.01)cm. Find the percentage error in the

volume.

v. The diameter of a wire as measured by a screw gauge was found to be 1.328, 1.330, 1.325,

1.334 and 1.336 cm. Calculate the percentage error.

vi. When radius of a sphere is measured with an error of ±1%, calculate error in calculations of

its volume.

vii. What is error in density of a cube when its mass is uncertain by ±2 % and length of its edge is uncertain by ±1% ?

viii. The sides of rectangle are (10.5±0.2) cm and (5.2±0.1) cm. calculate its perimeter with error limits.

ix. The heat dissipated in a resistance can be determined from the relation H= I2RT joule. If the

maximum error in the measurement of current, resistance and time are 2%, 1%, and 4%

respectively, what would be the maximum error in the dissipated heat ?

x. A physical quantity X is given by 2/1

32

CD

BAX

, if the percentage errors of measurement in

A,B,C and D are 4%, 2%, 3% and 1% respectively, then calculate the percentage error in X.

xi. State the number of significant figures in the following : (a) 0.007 m2 (b) 2.64 1024 kg

xii. Find the distance of the moon from the earth if the parallactic angle as measured from two

places located 6.4 x 106 m apart as 1o.

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xiii. The time period of a simple pendulum is given by T =2𝜋√𝑙

𝑔 Length of pendulum = 20 cm

and is measured up to 1 mm accuracy. Time period of about 0.6 sec.The time of 100

oscillations is measured with the watch of 1

10 resolutions. What is the accuracy in the

determination of g .

CHAPTER 3 : MOTION IN A STRAIGHT LINE

i. A car travels from A to B at a speed of 20 Km/h and returns at a speed of 30 Km/h.

Calculate the average speed of the car for the whole journey.

ii. A bus travelling the first one-third distance at a speed of 10km/h, the next one fourth at

20km/h and the remaining at 40km/h. what is the average speed of the bus? iii. A car travels a distance A to B at a speed of 40km/h and returns to A at a speed of 30km/h

(i) what is the average speed for the whole journey?(ii) what is the average velocity?

iv. A body starting from rest accelerates uniformly at the rate of 10 cm/s2 and retards

uniformly at the rate of 20 cm/s2. Find the least time in which it can complete the journey

of 5 Km if the maximum velocity attained by the body is 72 Km/h.

v. A body starting from rest accelerates uniformly along a straight line at the rate of 10 m/s2

for 5 seconds. It moves for 2 seconds with uniform velocity of 50 m/s. Then it retards

uniformly and comes to rest in 3 seconds. Draw velocity – time graph of the body and find

the total distance travelled by the body.

vi. Two straight lines drawn on the same displacement – time graph make angles 30o and

60o with the time axis respectively . Which line represents greater velocity ?What is the

ratio of the two velocities ?

vii. The given graph shows the velocity v versus time t of a body. Plot the corresponding

acceleration versus time graph.

viii. A body goes 30 Km south and then 40 Km east. What will be the displacement from initial

point ?

ix. A car covers a distance of 2 Km in 2.5 minutes. If it covers half of the distance with speed

40 Km/h , then with what speed it shall cover the rest distance ?

x. The displacement x of a particle along X- axis is given by 2783 ttx . Obtain its

velocity and acceleration at t = 2 s.

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xi. A body covers a distance of 4 m in 3rd second and 12 m in 5th second . If the motion is

uniformly accelerated , how far will it travel in the next 3 seconds ?

CHAPTER 4 : MOTION IN A PLANE

i. Determine the vector which when added to the resultant of kjiA ˆ7ˆ5ˆ3 and

kjiB ˆ3ˆ4ˆ2

gives the unit vector along Y-axis.

ii. Find the angles between the vectors kjiA ˆˆˆ and kjiB ˆ2ˆˆ .

iii. For what value of a are the vectors kjiaA ˆˆ2ˆ and kjaiaB ˆ4ˆˆ2 perpendicular to

each other ?

iv. Find the angle between the two vectors kjiA ˆˆˆ and kjiB ˆ2ˆ2ˆ2 .

v. The resultant of two vectors P and Q is perpendicular to P and its magnitude is half that of

Q. What is the angle between P and Q ?

vi. Two equal forces have the square of their result equal to three times their product. Find the

angle between them.

ACTIVITY : i) Make a paper scale of given least count: (a) 0.2 cm and (b) 0.5 cm.

ii) Write a project report on Vernier callipers.

BIOLOGY

1. Write the importance of classification of organism.

2. How viroids different from viruses?

3. What is the basis of modern classification? Give one example of a fungus as a source of

antibiotics?

4. Draw well labelled diagrams of :-

a) TMV virus

b) Arrangement of different types of teeth in the jaw.

c) Diagrammatic presentation of mitosis and meiosis.

5. Compare prophase I and II with mitotic prophase?

6. What does the liver do to help digestion?

7. Differentiate between

a) Chloroplasts & Mitochondria.

b) Passive Absorption & Active absorption.

c) Mitosis and meiosis

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8. Complete writing all biology practical’sin your practical notebook copy as per suggestions

suggested in the classroom.

9. Prepare an investigatory report on any topic of your choice related to the syllabus.

10. Study the chapters “The Living World” and “Structural Organizations in Animals (only

animal tissue part)” and make a power point presentation based on the topic atleast of 10

slides.

CHEMISTRY

Numerical based questions:

1. Calculate the molarity and molality of 93% H2SO4 (weight/volume).The density of the solution is

1.84 gmL-1.

2. A compound H2X with molar mass of 80 g is dissolved in a solvent having density 0.4 gL-1.

Assuming no change in volume upon dissolution, what is the molality of 3.2 M solution of the

compound?

3. If the binding energy of electrons in a metal is 250 kJmol-1, what is the threshold frequency of the

striking photons?

Short type questions:

1. Give the Lewis dot symbols for the elements given below:

a) Na b) Mg c) O d) N e) B f) Br

2. Give the Lewis dot symbols for the elements given below:

(a) Al and Al3+ (b) H and H– (c) S and S2-

3. Give the Lewis structure for the ions and molecules given below:

(a) SiCl4 (b) H2S (c) HCOOH (d) BeF2 (e) CO2−3

4. Comment about the shape of the molecules given below by using VSEPR model:

(a) BCl3 (b) SiCl4 (c) AsF5 (d) PH3 (e) BeCl2 (f) H2S

5. Give the resonance structures of the following ions:

(a) NO−3 (b) NO2 (c) SO3

Reasoning type questions:

Explain why:

1. The bond angle in H2O is less than NH3, even though they are having distorted tetrahedral structure.

3. CO2 is linear whereas SO2 is bend shaped.

4. Water has bent structure?

5. CO2 and SO2 both are triatomic but there is big difference between their dipole moment.

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6. AlF3 is ionic while AlCl3 is covalent.

7. BeH2 molecule has zero dipole moment although the Be-H bonds arepolar.

8. The bond angle of H – C – H in methane (CH4) is 109° 28’ while H – N – H bond angle in NH3 is

107° though both carbon and nitrogen are sp3 hybridized.

9. Bond angle in NH3 is 107° while in H2O it is 104.5°.

10. The bond angle of H2O is 104° while that that of F2O is 102°.

11. ClF2- is linear but ClF2

+ is a bent molecular ion.

12. o- hydroxybenzaldehyde is liquid at room temperature while p - hydroxybenzaldehyde is high

melting solid.

Long type questions:

1. How can you apply green chemistry for the following:

(i) to control photochemical smog.

(ii) to avoid use of halogenated solvents in drycleaning and that of chlorine in bleaching.

(iii) to reduce use of synthetic detergents.

(iv) to reduce the consumption of petrol and diesel.

2. Green plants use carbon dioxide for photosynthesis and return oxygen to the atmosphere, even then

carbon dioxide is considered to be responsible for greenhouse effect. Explain why?

3. What is smog? How is classical smog different from photochemical smog? Write down the reactions

involved during the formation of photochemical smog.

4. What are pesticides and herbicides? Explain with examples. What effort will you make for

controlling the soil pollution?

MATHEMATICS

1. Write the following sets in set builder form

I) {1/4, 2/5, 3/6, 4/7, 5/8}

II) { ...., -5, 0, 5, 10, ....}

III) {-4, 4}

2. In a survey of 100 students, the number of students studying the various languages were found to

be English only 18, English but not Hindi 23, English and Sanskrit 8, English 26, Sanskrit 48, Sanskrit

and Hindi 8, Number of no language 24. Find

a. How many students were studying Hindi?

b. How many students were studying English and Hindi.

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3. In a survey of 25 students it was found that 15 had taken Math’s, 12 had taken Physics and 11 had

taken Chemistry, 5 had taken Math’s and chemistry, 9 had taken Math’s 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. Only Math’s

c. Only Physics

d. Physics and Chemistry but not Math’s

e. Math’s and Physics but not Chemistry

f. Only one of the subject

g. At least one of the subjects

h. None of the subjects

4. Of the members of three athletic team in a certain school, 21 are in the Basketball Team, 26 in the

Hockey team and 29 in the Football team. 14 play hockey and basketball, 15 play hockey and

football, 12 play football and basketball and 8 play all the three. How many members are there in

all?

5. Let A and B be two finites sets such that n(A) = m and n(B) = n. If the ratio of number of elements of

power sets of A and B is 64 and n(A) + n(B) = 32. Find the value of m and n.

6. Let A = {x / x is a natural number <12 } and R be a relation in A defined

by (x,y) in R if x+y = 12, then write R.

7. Show that the following:

a. cos 10 cos 50 cos60 cos70=3/16

b. sin 10 sin 50 sin60 sin70= √3

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c. cos 20 cos40cos60=1/8

8. . Solve the equation 4 sinx cosx + 2sinx +2cosx+1=0

9. For every integer n, prove that 7n -3n is divisible by 4.

10. Prove that n(n+1)(n+5) is a multiple of 3.

11. Prove that(1+1

1 )( 1+

1

2 )(1+

1

3 )………….(1+

1

𝑛 ) =(n+1)

12. Using induction, prove that (10 n + 3.4 n+2 + 5) is divisible by 9.

13. Prove that 12 + 22 + 3 2 + ……… + n2 >𝑛3

3, by using mathematical induction.

14. Prove that (ab)n = an bn

15. For sets, A, B and C, using properties of sets, prove that

a. ( A∪ B ) ∩(A ∪B’)=A

b. ( A ∪B)- C =(A- C)∪ (B- C)

16. Find the value of 𝑐𝑜𝑠2 73° + 𝑐𝑜𝑠2 47° +𝑐𝑜𝑠 𝑐𝑜𝑠 73° 𝑐𝑜𝑠 𝑐𝑜𝑠 47°

17. If 𝛼 𝑖𝑛 𝑓𝑖𝑟𝑠𝑡 𝑞𝑢𝑎𝑑𝑟𝑎𝑛𝑡, 𝛼 =𝜋

19. 𝐹𝑖𝑛𝑑 𝑡ℎ𝑒 𝑣𝑎𝑙𝑢𝑒 𝑜𝑓

𝑠𝑖𝑛𝑠𝑖𝑛 23𝛼−𝑠𝑖𝑛𝑠𝑖𝑛 3𝛼

𝑠𝑖𝑛𝑠𝑖𝑛 16𝛼+𝑠𝑖𝑛𝑠𝑖𝑛 4𝛼

18. Show that √2 + √2 + √2 + 2 𝑐𝑜𝑠 𝑐𝑜𝑠 8𝜃 = 2 𝑐𝑜𝑠 𝑐𝑜𝑠 𝜃

19. Show that 𝑠𝑖𝑛 𝑠𝑖𝑛 𝜋

14 𝑠𝑖𝑛 𝑠𝑖𝑛

3𝜋

14 𝑠𝑖𝑛 𝑠𝑖𝑛

5𝜋

14 𝑠𝑖𝑛 𝑠𝑖𝑛

7𝜋

14 𝑠𝑖𝑛 𝑠𝑖𝑛

9𝜋

14 𝑠𝑖𝑛 𝑠𝑖𝑛

11𝜋

14 𝑠𝑖𝑛 𝑠𝑖𝑛

13𝜋

14 =

1

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20. Project on PASCAL’s Triangle.

a. Find the beauty of Pascal’s Triangle.

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Evaluation of Project work

a. The project should be carried out individually

b. The weightage of 5 marks and statement of the project may be as under

● Identification and statement of the project : 1mark

● Planning the project : 1 mark

● Procedure adopted : 1 mark

● Observation from data collected : 1 mark

● Interpretation and application of result : 1 mark

COMPUTER SCIENCE

Programming in Python :

1. Input any four numbers and print their multiplication . 2. Input the length and breath of the rectangle. Find out the area of the rectangle. 3. Write a program to read two numbers and swap their values. 4. Input a student roll number, name, mark of English , Mathematics , Physics, Chemistry and

Computer Science. Find out the total mark and average mark.

5. s= ut + 1

2 a t 2

6. Input any three numbers and find out the minimum number . 7. Input a number, if the number is odd then print the square of the number. 8. Input a number and find out if it is positive or not. 9. Input a customer name and any five product quantities and rate. Find out the each product

total and grand total. 10. Input an employee name, address and basic payment . Find out the da,hra, medical, pf,

gross_salary and net_pay . Da = 60 % of basic Hra=35 % of basic Medical=10% of basic Pf=12% of basic Gross_salary=basic+da+hra+medical Net_pay=gross_salary – pf

PHYSICAL EDUCATION

● Students must exercise regularly for 30-40 minutes every morning. Teachers will check BMI

and Waist-Hip Ratio after summer vacation ● Students will make the daily schedule of morning exercise.

NOTE:

Marks will be awarded on the basis of (a) Timely submission (b) Completion (c) Presentation

Holiday assignment should be submitted on 3rd August 2019.

Holiday home works should be done in separate notebooks for each subject.