NEW ERA PUBLIC SCHOOL DWARKA

CLASS XI

Holiday Homework 2017-18

ENGLISH

1. Write a book review of "The Canterville Ghost".

2. Pick out any 5 newspaper articles and use them as passages for note making and summary

writing.

3. Paste the cutouts of any 5 Classified Advertisements in your notebook. Then, slightly alter the

details given in the advertisements and make new ones in the notebook.

4. Based on a candid conversation between you and your grandparent(s) or anyone who would

around the age of your grandparents, write a story in your notebooks.

PHYSICAL EDUCATION

Draw a neat diagram of any one game of your choice from the given list in Chart.

1. Badminton

2. Table tennis

3. Lawn Tennis

4. Football

5. Volleyball

6. Basketball

7. Cricket

MATHS

Sets

20. Let A and B be two finite sets such that n(A) = 20, n(B) = 28 and n(A ∪ B) =36,

find n(A ∩ B).

21. If n(A - B) = 18, n(A ∪ B) = 70 and n(A ∩ B) = 25, then find n(B).

22. There are 35 students in art class and 57 students in dance class. Find the number of students

who are either in art class or in dance class.

(i) When two classes meet at different hours and 12 students are enrolled in both activities.

(ii) When two classes meet at the same hour.

23. In a competition, a school awarded medals in different categories. 36 medals in dance, 12

medals in dramatics and 18 medals in music. If these medals went to a total of 45 persons and only

4 persons got medals in all the three categories, how many received medals in exactly two of these

categories?

24. Each student in a class of 40 plays at least one indoor game chess, carrom and scrabble. 18 play

chess, 20 play scrabble and 27 play carrom. 7 play chess and scrabble, 12 play scrabble and carrom

and 4 play chess, carrom and scrabble. Find the number of students who play (i) chess and carrom.

(ii) Chess, carrom but not scrabble.

25. In a group of 100 persons, 72 people can speak English and 43 can speak French. How

many can speak English only? How many can speak French only and how many can speak both

English and French?

BIOLOGY

Instruction:

Students will do the assignment questions in their notebook.

CHAPTER – 1: CELL: THE UNIT OF LIFE

1) Explain the structure of the following with diagram

a) Plasma membrane ( fluid mosaic model)

b) Mitochondria

c) Plastids

d) Nucleus

2) Give functions of the following:

a) Cytoskeleton

b) Nuclear pore

c) Histones

d) Kinetochores

e) Microbodies

f) Plasmodesmata

g) Fimbriae

h) Mesosomes

i) Golgi apparatus

j) Plasmids in bacteria

k) Centriole

l) Nucleolus

m) polysome

3) What are inclusion bodies? Name the four types of them.

4) Differentiate between the following:

a) Gram positive and gram negative bacteria

b) Pilus and fimbriae

c) Leucoplasts and chromoplasts

d) Mitochondria and chloroplasts

e) Cilia and centriole

f) Cilia and flagella

g) Amyloplasts , elaioplasts & aleuroplasts

5) Differentiate active transport and passive transport.

6) Explain the various components of endomembrane system.

7) a. Give the term for the pile of thylakoids

b. What is carbon fixation? Where does it occur?

c. Name the lamellae that connect stroma and grana.

d. What is the unit structure of photosynthesis?

e. Name the plastids that store proteins and fat.

f. Name any three plastids which do not synthesize food.

8) Differentiate between primary and secondary metabolites with examples.

9) Explain how a disaccharide molecule is formed? Write the structures of maltose.

10) What is meant my dehydration synthesis and hydrolytic splitting?

11) Write short note on a) Polysaccharide b) Nucleic acid

12) Explain the primary, secondary, tertiary and quaternary structure of protein molecule.

13) Differentiate between DNA and RNA.

14) Describe the structure of DNA and mention it’s function.

15) What are glycosidic bonds and peptide bonds?

16) Differentiate between anabolism and catabolism.

17) a)Why enzymes are called biocatalysts?

b)Differentiate between prosthetic group and co-enzyme.

c)What is an active site of an enzyme molecule?

d)How can you say that enzymatic reactions are faster than non-enzymatic reactions?

e)Explain the properties of an enzyme molecule.

f) How substrate concentration does affect the velocity of an enzyme action?

g) How can we calculate the rate of enzyme reaction?

h) Describe the different steps involved in the catalytic cycle of an enzyme action.

i)What are the factors which affect the enzyme activity?

j) What is competitive inhibition? Explain with an enzyme.

k)What are co-factors?

l) Describe the classification and nomenclature of enzyme

18) Differentiate the karyokinesis from cytokinesis.

19) Describe the various stages of mitosis with the help of neat labeled diagram.

20) How does cytokinesis differ in plant cell from an animal cell?

21) Differentiate between the following

(i) Metaphase I of meiosis from Metaphase of mitosis

(ii) Anaphase I of meiosis from Anaphase of mitosis.

22) Differentiate between various stages of Mitosis and Meiosis.

23). Describe the following: (a) homologous chromosomes (b) synapsis

(c) bivalent (d) chiasmata. Draw a diagram to illustrate your answer.

24) Explain various stages of Meiosis with the help of diagram.

25) Which of the following statements are related to following phases of mitosis

a) Prophase b) Metaphase c) Anaphase d) Telophase

e)Interphase

i. Reformation of nuclear membrane

ii. Chromosomes are short and thick

iii. Chromosomes are constricted

iv. Division of centromere in two parts

v. Nucleus becomes active but chromosomes are indistinct

vi. Stage after cytokinesis

vii. Formation of chromatids from chromosomes

26) Give scientific terms for the following :

i. Stage between two mitotic division

ii. The process of cell division in which chromosome number is reduced to half

iii. Point of attachment of two chromatids

iv. Stage of cell cycle in which protein synthesis and RNA synthesis take place.

v. Division of nucleus

II) Prepare an investigatory project report on the allotted topic.

PHYSICS

Unit 1 - Physical World and Measurement

Q1. Write the no. of significant figures in the following numbers:

(i) 1000cm (ii) 1000 Nm2 (iii) 1108cm

(iv) 1.0108cm (v) 1.005 gm/cm3 (vi) 1.00500 m2

(vii) 0.0005 nm (viii) 0.00050 g (ix) 0.17

(x) 35.00 m (xi) 0.006320 Kg (xii) 6.0325 Å

Q2. Write the dimensional formula of following physical quantities:

(i) coefficient of friction (ii) strain (iii) Relative density (iv) Avogadro number.

Q3. If the percentage error in the measurement of ‘V’ and ‘I’ are 2% & 3%. Find the % error in

the measurement of resistance in an experiment (ohm’s law).

Q4. Escape velocity of a mass on the surface of earth depends upon gravitational constant (G), mass of earth (M) & radius of earth (R). Derive a relation connecting these physical

quantities. [v = k G½ M½ / R½]

Q5. In an experiment a physical quantity ‘Y’ is measured as Y = ab4 /c3, where

a = 2 0.02 unit, b = 3 0.03 unit& c = 5 0.05 unit. Calculate the maximum permissible percentage error in the measurement of Y. [8%]

Q6. Round off the following to three significant figures.

(i) 1.0084 (ii) 0.005135

(iii) 39.99 (iv) 3.1570× 106

Q7. Derive using method of dimensions, an expression, for the energy of a body executing

SHM, assuming that this energy depends upon.

(i) The mass ‘m’

(ii) The frequency n, and

(iii) Amplitude of vibration of the body. [E = kmn2r2]

Q8. Find the value of 100 dyne on a system based upon the metre, the kilogram and the

minute as the fundamental units.

Q9. Show that angular momentum has same dimensions as those of planck’s constant.

Planck’s constant is given by the relation E = hν where letters have their usual

meanings.

Q10. Find the dimensions of a/b in the equation : F = a√x + bt2, where F is force, x is Distance and t is time.

Unit 2- Kinematics

Q11.The position of particle moving on x-axis is found to vary with time as x = t3 + 4t2– 2t + 5. Find :

(i) The velocity of the particle at t = 4 sec.

(ii) The acceleration at t = 4 sec.

Q12.Position of a particle moving with time ‘t’ is given by x = 2 – 5t + 6t2. What is its initial

velocity.

Q13.The distance of an object is given as s 3t 2 10t 8

Find-

(i) The speed at t = 2sec

(ii) The time at which the speed is zero.

(iii) The time at which the distance is zero.

(iv) The acceleration.

Q14.A ball moves 40m in last second of its journey & 10m in the 1st second of its journey. If it

starts from rest find the total distance moved by the ball. [62.5 m]

Q15.Can the speed of a particle vary if its velocity is constant? Can reverse be true?

Q16.In fig, ball 1 is released from rest at the top of a smooth inclined plane and at the same

instant ball 2 is projected upward form the foot of the plane with such a velocity that they meet

half way-up the plane. Determine –The velocity of projection

Q17.î and ĵ are unit vectors along x and y axis respectively. What is the magnitude and

direction of the vectors î + ĵ, and î – ĵ? What are the components of a vector A = 2 î + 3 ĵ along

the directions of î + ĵ, and î – ĵ?

Q18.A man can swim with a speed of 4 km/h in still water. How long does he take to cross a

river 1 km wide if the river flows steadily at 3 km/h and he makes his strokes normal to the river

current? How far down the river does he reach when he reaches the other bank?

[15min,0.75km]

Q19.The resultant of two unit vectors acting in a plane is also unity. Find the angle between the

two vectors. [1200]

Q20.In a harbour, wind is blowing at the speed of 72 km/h and the flag on the mast of a boat

anchored in the harbor flutters along the N-E direction. If the boat starts moving at a speed of 51

km/h to the north, what is the direction of the flag on the mast of the boat? [Eastward]

CHEMISTRY

1) Solve 5 numerical questions on each

i) Mole particle relation

ii) Mole mass relation

iii) Mole volume relation

iv) Stoichiometry

v) Limiting reagent

vi) E.f and molecular formula

A class test shall be conducted on above topics when the school reopens.

2) Prepare a periodic table on chart paper/thermocol /card board highlighting metals /non

metals/metalloids /inter gases with different colours .Try writing peculiar properties of

elements in the block of that element to make it more informative.

3) Investigatory project on the given topics which shall be for the final (future) board

practical exam.

Topics are

1) Milk analysis

2) Elevation in boiling point

3) To study crystal system by crystallography

4) To test presence of nickel in various brands of chocolates

5) To determine calorific value of different food items

6) To determine quantity of casein present in milk sample

7) Qualitative analysis of tooth paste (for various cations and anions present in it)

etc.(for others topics please refer cbse site) .

Write answers for these in your class work copy

1) What will be the mass of one atom of C-12 in grams?

2) Hydrogen gas is prepared in the lab. By reacting dilute HCl with granulated zinc.

Following reaction takes place. Zn + 2HCl ZnCl2 + H2. Calculate the volume

of hydrogen gas liberated at STP when 32.65g of Zinc reacts with HCl. 1 mole of gas

occupies 22.7 L volume at STP; atomic mass of Zinc = 63.5u.

3) What is the empirical formula? Write the empirical formula for i) CH3COOH ii)

H2O2. (2)

4) A compound made up of two elements A and B has A = 70%, B = 30%. Their relative

no. of moles in the compound are 1.25 and 1.88. calculate i) atomic mass of elements

A and B. ii) molecular formula if molecular formula mass is found to be 160.

5) A black dot used as full stop at the end of a sentence has a mass of about one

attogram. Assuming that the dot is made up of carbon, calculate the approximate no.

of carbon atoms present in the dot.

6) Gastric juice contains about 3g of HCl per litre. If a person produces 2.5L of gastric

juice per day, how many antacid tablets each containing 400mg of Al(OH)3 are

needed to neutralize all the HCl produced in one day.

7) Derive an expression for the wave no.

8) Calculate the wavelength of the radiation emitted when an electron in a hydrogen

atom undergoes a transition from 4th energy level to the 2nd energy level. In which

part of the electromagnetic spectrum does this line lie.

9) Calculate the velocity of electron in the first orbit of hydrogen atom. Given that the

bohr radius = 0.529A0.

10) What will be the wavelength of a ball of mass 0.1 Kg moving with a velocity of

10m/s?

11) Two particles A and B are in motion. If the wavelength associated with particle A is

5X10-8m, calculate the wavelength associated with particle B if its momentum is half

of A.

INFORMATICS PRACTICES

I. Create a Power Point presentation on any one of the following topics:

(minimum 15 slides)

1. Information Security, Security threats and their measures

2. Update on the latest gizmos.

3. E-business

4. Rapid Application Development (RAD) model of Programming

II. Study the interface of NetBeans IDE and make a report on any 10 of its features in your

notebook.

III. In your notebook, write short notes on

(i) Characteristics of Java

(ii) Java Virtual Machine (JVM)

COMPUTER SCIENCE

I. Create a Power Point presentation on any one of the following topics:

1. Types of Operating System

2. Open Source Softwares

3. Object Oriented Programming Methodology.

II. In your notebook, do the following questions:

Unit - 1

Q1 What are the different types of Microprocessors? Explain each one of them.

Q2 Explain the different types of RAM and ROM.

Q3 What are ports in computers? Explain the different types of ports.

Unit - 2

Q1 Differentiate between Structured Programming and Object-oriented Programming.

Q2 What are the types of errors in Programming Methodology? Explain each of them

with an example.

III. Write an algorithm and develop a flowchart for the following problems in your notebook:

1. To prepare a cup of tea.

2. To calculate simple interest based on principal, rate and time input from the user.

3. To print even numbers upto 60.

IV. In your notebook, write a C++ Program to do the following tasks:

1. To accept two numbers from the user and perform all arithematic operations

(+,-,*,/,%) on them and display the respective results.

2. Display 5 features of Object-Oriented Programming (OOP), each feature printed on a

separate line at the center of the screen, and within the following format :

****************************************

Object-Oriented Programming

****************************************

1. ____________________

2. _____________________

3. _______________________

4. _______________________

5. ________________________

******************************************

ECONOMICS

Chapter: 1: Indian Economy on the Eve of Independence

1. Make a beautiful chart to depict comparison and contrast in India's economic

development situations between 1950 and 2017, using diagrams, fact-file and

pictures.

2. Given below is a glossary of important economic terms. Define them briefly:

(i) Self-sufficient (ii) Imperial rule (iii) Colonial economy (iv) Sector of an economy

(v) Primary Sector (vi) Secondary Sector (vii) Tertiary Sector (viii) Stagnant economy

(ix) Backward economy (x) Depleted economy (xi) Lop-sided industrial sector (xii)

National income (xiii) Per Capita Income (xiv) Productivity (xv) Occupational

structure (xvi) Demographic transition (xvii) Birth Rate (xviii) Infant Mortality Rate

(xix) Life expectancy (xx) Capital goods

3. Indicate True or False:

(a) The village community in India was a self-sufficient unit in the 18th century.

(b) Indian handicrafts could not compete with machine made goods.

(c) India's per capia income grew at the rate of five per cent per annum during the

British

Raj.

(d) Intermediary system already existed in India when the British took over in 1757.

(e) The British encouraged Indian handicrafts.

(f) India inherited a well developed infrastructure from the British.

4. Match the following:

(a) Depleted (i) Number of those dying with reference to those born.

(b) Agrarian (ii) No. of persons dying per thousand population.

(c) Mortality Rate (iii) devoid of all resources.

(d) Handicrafts (iv) traditional work

(e) Stagnant (v) largely depending on agriculture.

(f) Death rate (vi) lack of growth

(g) Hundis (vii) credit notes

(h) Social infrastructure (viii) transport

(i) Economic infrastructure (ix) water supply

(j) Literacy rate (x) Number of literate persons over population.

5. Answer the following questions in a single word or sentence.

(i) What is the intermediary system?

(ii) Define unemployment.

(iii) Name two infrastructures that the British developed in India.

(iv) What is the Central Bank of India known as? When was it set up?

(v) Name the three sectors into which an economy can be divided

(vi) What was the birth rate in India in 1950?

(vii) Which year is called the Year of Great Divide?

(viii) When did the British start the first train in India?

(ix) When was the first ever census of India conducted?

(x) What was the IMR in India in 1950?

(xi) What was the literacy rate in the country among men and women in 1947?

(xii) Define the vicious circle of poverty.

(xiv) What was the average life expectancy in India in 1947?

(xv) Write the names of two Indian economists who tried to measure India's GDP?

Significance of Statistics in Economics

I. Make small colourful cut-outs on economic glossary of 20 terms with their brief

definitions from your textbook 'Statistics for Economics'.

II. Answer the following questions in to-the point words.

1. Distinguish between statistics in singular sense and statistics in plural sense.

2. Distinguish between economic activities and non-economic activities.

3. Write short notes on any four economic activities.

4. Write four points on mistrust of statistics and suggest two ways to remove it.

5. Distinguish between descriptive and inferential statistics.

6. Discuss importance of statistics for economic theoreticians and planners.

7. Briefly describe stages of statistics.

8. Give names of tools and methods specific to each statistical stage.

9. Give development definition of economics and outline its features.

10. Criticize Wealth definition of economics given by Adam Smith.

III. Frame 10 Multiple Choice Questions yourself from Ch. 1 in Statistics.

IV. Frame 10 True and False Statements yourself from Ch. 2 in Statistics.

V. Frame 10 Fill in the Blank statements yourself from Ch. 3 in Statistics.

VI. Write pen-sketches on 3 modern Economists of India (in 125 words each) with

their pictures and details of their birth, life, works and achievements.

BUSINESS STUDIES

➢ Complete the Project work on assigned topic and submit after the summer break.

➢ Complete the given assignment in a separate copy.

➢ Prepare a PPT on any one topic (include pictures etc.):

a) Any five Government companies

b) Any five public companies

c) Any five private companies

Assignment Nature and purpose of Business

1. ‘Business cannot fulfill its economic objectives, without fulfilling its social and

human objectives.’ Comment.

2. ‘Auxiliaries to business activities are indispensable.’ Discuss.

3. ‘Business risks take place due to carelessness of people and it can be completely

eliminated. ‘Do you agree? Give reasons.

4. Which type of cause of Business Risk is ‘power failure’? Explain.

5. In which type of secondary industry, various raw materials are combined together to

make the final product?

6. Name and explain two features of business which involve possibility of loss.

7. Which cause of business risk is ‘change in technology’ an example of?

8. Sameera has done Post graduate diploma in clothing and textiles from a premier

institute. Though she does not have any business experience, she wants to start her

own business of manufacturing readymade garments of the latest fashion. These

garments will be sold in Indian markets as well as exported to prominent foreign

countries. Questions:

(a) Is Sameera’s lack of business experience a significant risk for the business? If yes,

in what way?

(b) What are the other risks that are involved in garment business?

Forms of Business Organization

1) In case of recovery of debts against a sole proprietor filed by the creditor, the court

rejected the sole proprietor’s plea that firm was responsible for paying off the business

debt. This is due to which feature of sole proprietorship?

2) “One man control is best in the world if that man is big enough to manage everything.”

Explain the statement.

3) The business assets of a firm are worth `70,000 but the debts remain unpaid are worth

1,00,000. What course of action can the creditors take in the following cases:

a) The organization is a sole proprietor firm.

b) The organization is a partnership firm with A and B, two partners sharing

profit equally.

4) What factors are important to be considered while starting a business?( any five points)

5) The business of a sole proprietor is expanding. He is confused whether to appoint a

manager or to admit a partner into the business. Give three reasons in support of both

the options available to him.

6) Which certificate is called the birth certificate of a company and why?

7) “A promoter cannot be the trustee or an agent of a company.” Comment.

8) Differentiate between Memorandum of Association and Article of Association (any six

points).

9) Explain the merits and limitations of joint Hindu Family form of business.

10) What are the merits and demerits of Sole-proprietorship form of business.

11) Name the various forms of Cooperative societies. Explain any three in detail

12) Explain the following terms

a) Qualification Shares

b) Preliminary contracts

c) Provisional contracts

ACCOUNTANCY

1) On 1st April, 2015 Mr. Kamal was appointed as Finance Manager of the firm with a salary of `

60,000 per month. State whether this event will be recorded in the books of accounts.

2) “Accounting information should be comparable.” Do you agree with this statement? Give reason.

3) Non – monetary transactions are not recorded in the books of accounts.” Explain.

4) State the nature of information required by Investors.

5) What do you mean by accounting period?

6) Write any two examples of intangible assets.

7) On 1st April, 2015 Mr. Kamal was appointed as Finance Manager of the firm with a salary of

` 60,000 per month. State whether this event will be recorded in the books of accounts.

8) “Accounting information should be comparable.” Do you agree with this statement? Give

reason.

9) What are the steps for accounting process?

10) Explain any three limitations of accounting.

11) Explain any three differences between book keeping and accounting.

12) Explain the following accounting terms :

a. Asset

b. Income

c. Drawings

d. Fictitious Assets

e. Depreciation

f. Cash discount

g. Expenditure

h. Gain

i. Current Assets

3) What is owner’s equity? Give an equation for calculating owner’s equity.

4) Give an example of a transaction where an asset and owner’s capital will decrease.

On 31st March 2014, a businessman had the capital worth ` 9,00,000 . External liabilities and

assets as on 1st April 2013 were ` 1,20,000 and ` 2,00,000 respectively. During the year, the

proprietor had withdrawn ` 20,000 and introduced ` 26,000 as additional capital. Find out his profit

or loss during the year.

5) Mr. Munjal started a business on 1st April, 2014 with a capital of ` 1,80,000 and a loan

of `60,000 taken from SBI Bank. During 2014-15, he had introduced additional capital of ` 45,000

and had withdrawn ` 35,000 for personal use. On 31st March, 2015 his Assets were ` 2,50,000. Find

out his capital as on 31st March 2015 and profit made or loss incurred during the year 2014-15.

6) Show the accounting equation on the basis of the following transactions.

• Sitaram commenced business with cash ` 2,00,000; goods ` 60,000.

• Opened a Current account with PNB and deposited ` 45,000.

• Purchased goods on credit from Goyal & Brothers ` 22,000.

• Paid Rent ` 5,000 by cheque and Rent still outstanding ` 5,000.

• Sold goods on credit to Rohan costing ` 14,000 for ` 12,500.

• Donated goods costing ` 1,000 to a charitable trust.

• Investment made in shares ` 4,000 for personal use.

• Interest charged on drawings @ 10% p.a.

7) Show the accounting equation on the basis of the following transactions and also show the

Balance Sheet.

• Started business with cash ` 1, 50,000, Machinery ` 3, 00,000 and Inventory ` 2, 00,000.

• 30% of the above goods are sold to Priya at a profit of 331/3% on cost and received 50%

payment in cash and for the balance drawn a bill for 3 months.

• Depreciation charged on Machinery @ 10% p.a. for 4 months.

• Rent received ` 15,000 including ` 6,000 in advance.

• Purchased goods for ` 30,000 and paid half the money in cash.

• Paid to creditor ` 14,000 in full settlement.

• Goods costing ` 5000, selling price ` 6000 destroyed during flood.