AUTUMN BREAK HOLIDAYS HOMEWORK (2019-20)Class XI

ENGLISH

1.Design 5 posters from the list given below: 

a) Road Safety Tips- Delhi Traffic Police,  

b)Eye Donation,  

c)Say ‘No’ to plastic, 

d)Tree Plantation Week,      e)Say ‘No’ to Tobacco,  f)Eco friendly Diwali, 

h)Save Water

2. Read English Newspaper everyday. Take the cuttings of at least 7 editorial articles from

the newspaper and paste them in the notebook. Prepare notes of the pasted articles.

3.Collect the advertisements from the newspaper and them as per taught in the class-

Classified and Non- Classified Advertisements.

4.Update your work as per the syllabus covered in your class. 

5.Revise the covered syllabus for your Half Yearly Exams

PhysicsSolve exercise questions as given below

Laws of motion

5.1 ,5.2 ,5.3, 5.5, 5.6 ,5.7 ,5.8 ,5.9 ,5.13

5.14., 5.16, 5.17, 5.1 8,5.19 ,5.21 ,5.23 ,5.27, 5.28 ,5.29 ,5.30.

Work energy and power

6.1 ,6.2, 6.3 ,6.6 ,6.7 ,6.8 ,6.9,6.10, 6.1121, 6.24

Prepare for Half yearly exam.

CHEMISTRY

GEOGRAPHY

1. Prepare practical record file up to chapter 5.The record file should be written in neat and clean handwriting.2. Draw all the maps given in the book “physical geography” up to chapter 12 and practice these maps.3. Draw all the maps and diagrams given in the book of India up to chapter 4 and practice there.5. Learn all the Question –answers of all chapters of both book taught till 05/10/19 and write these answers for practice and preparation of half yearly exam 2019-20.

HINDI

ACCOUNTANCY1. Revise ch.1 to ch.19 for half yearly exam.2.Practice 5 questions of Double Column Cash Book (i.e., Q7,8,9,12&14).3.Practice 5 questions of Bank Reconciliation Statement (i.e., Q3,6,9,10&11).4.Practice 5 questions of Subsidiary Book along with their ledger posting (i.e., Q1,5,7,8&10).5.Practice 5 questions of Rectifying Journal Entries (i.e., Q3,6,8,12&22).6.Practice 6 questions of Depreciation 3 questions by straight line method (i.e., Q1,5&7) and 3 questions by diminishing balance method (i.e., Q11,13,15,16&17).7.Practice 5 questions of compound journal entries (i.e., Q6,7,10,12&14).

8.Prepare a comprehensive project on any topic from ch1 to 21 .

SUBJECT BUSINESS STUDIES

1 Prepare a project work on any topic mentioned in chapter 1 to 7

2 Prepare chapter 1 to 7 for test along with short notes.

Mathematics1.Out of 280 students in class XII of a school.135 play hockey.110 play football,80 play volleyball.35 of these play fockey and football,30 play volleyball and hockey,20 play football and volleyball.Also ,each students plays at least one of three games.How many students play all the three games.2.Let A = {3,5 } and B = {7.11}. Let R = {(a, b):a Є A, bЄ B, a-b is odd}. Show that R is an empty relation from A to B.3.Let A = {1,2} and B = {3,4}. Find the total number of relation from A to B.4 .Find the domain of the following real valued function

(i). f(x) =2x−3x2−3x+2

(ii) F(x) = √4−x2 (iii) F(x) = 1

√1−x (iv) F(x) = √ x−2

5.If secx + tanx = p,obtain the values of secx, tans and sinx in terms of p

6.Prove that sin2(π8+x2 ) - sin2(

π8+x2 ) =

1√2

sinx

7.Prove that prove that tan 700 = tan200 +2tan500

8. Prove that cos6 x+6cos4 x+15cos2 x+10cos5 x+5cos3 x+10cosx = 2cosx

9.Prove that sin 2 x1+cos2x =tanx (ii) cosx/(1+sinx) = tan (

π4−x /2¿

10If tanx =3/4 .π<x<3 π2 ,find the values of sin(x/2),cos(x/2),tan(x/2)

11. Prove that sinπ10 = √5−1

4

12. Solve the equation cos x +cos3x -2cos2x = 0

13.If (x+iy)13 = a+ib ,x.y,a,b ∈R show that

(i) xa +

yb 4(a2 – b2) (ii)

xa -

yb = -2(a2 +b2)

14.Find the square root of 1-i

15 Express the number −161+ i√3

in polar form.

16.If 1−ix1+ix = a + ib ,then find the value of a2 +b2 .

17.Solve the following system of inequations graphically2x+3y ≥6 , 3x+2y ≤6 , x ≥0,y ≥0

HISTORY1. Revision of all chapters (Chapter 01-07)2. Map skill: In notebook based on chapters (Chapter 01-07)3. Prepare CBSE Project/Practical on any one of following topics:

Anthropological Research based on Darwin’s Theory Making and unmaking of Mesopotamia Paradigms of Greco-Roman civilization Critique of the industrialization in Britain Relations and impacts of past crusades Aspirations of women in the Renaissance period Paths to Modernization of Japan / China An in-depth study into “now and then” paradigm of Christianity An exploratory study into the realism and the transmission of

Humanistic ideas Scientific Revolution and the origins of modern science An Exploratory study into Humanism Learning about global Sufism History of aborigines – America / Australia Piecing together the past of Genghis Khan An exploratory study into the making of America Myriad Realms of Slavery in the ancient, medieval and modern world

Note: This project will be the part of assessment 4. Prepare 10-10 MCQs from each lesson .

POLITCAL SCIENCE

COMPUTER SCIENCEWrite the python program for the following:

1. Check if the number is positive or negative or zero using if elif2. To check if the input number is odd or even.3. To convert a numerical grade to a letter grade, ‘A’, ‘B’, ‘C’,’D’ or ‘F’, where the cutoffs for

‘A’, ‘B’, ‘C’, and ‘D’ are 90, 80, 70, and 60 respectively using if else ladder.4. Find the greatest no between two.5. Find the largest number among the three input numbers using logical operator.6. Take in the Marks of 5 Subjects and Display the percentage. Consider all the marks are

out of 100.7. To find the factorial of a number8. Write a program to add N natural nos9. Write a program to multiply N natural Nos.10. To find the sum of digits of a number11. To count the number of digits in a number12. Write a program to calculate product of digits of a number. For example if N=345 then it

should produce 3*4*513. To check if a number is a armstrong number or not.14. Checking whether a number is prime or not15. To print the table of a given number16. Write a program to generate Fibonacci Series i.e 0 1 1 2 3 5………..17. To check if a number is a palindrom or not.18. Write a program to get a list from the user and print sum of all the numbers.19. Write a program to search an element in list and print the index of that element in the

list20. Write a program to print maximum and minimum element in the list(hint: use sort( )

function)21. Create a dictionary of five customer and their corresponding phone number of

customer.22. To print pyramid of stars

**********

23. Write a program which will get a string and print it into capitals.24. Write a program which will get list and an element form the user and count and print

frequency of element in the list.25. Write a program for bubble sort26. Write a program for insertion sort.

ECONOMICS1. Do any 5 numericals on Ed & Es.2. Explain consumer's equilibrium in case of a single commodity and two commodities ( Cardinal Utility Approach)3. Explain ' Law of variable proportions' with the help of a schedule and diagram. Show relationship between TP and MP, MP and AP.4. Explain producer's equilibrium through MR- MC approach ( when price remains constant and when price falls with rise in output)5. Revise the covered syllabus.

BIOLOGY SECTION-A

1. Name the filamentous structure which appears in mosses after germination of spore? 1

2. Define the term Genus. To which genus potato and tomato belongs. 1

3. During a practical class you are shown a slide on anatomy of plants. How will you assert

that the givenslide is of T.S. of monocot stem. 1

4. Which connective tissue lacks fibres in its matrix? 1

5. What is the functional difference between RER and SER ? 1

SECTION - B

6. With which phylum would you associate the following structures-

a) Flame cells b) presence of haemocoel

c) Jointed appendages d) presence of operculum 2

7. Name the phytohormone involved in if---

a ) A farmer wants to remove the weeds in his garden.

b) A plant breeder wants to initiate rooting during tissue culture.

c) Name the stress hormone.

d) A farmer is interested in increasing the length of sugarcane stem. 2

8. Which hormone is responsible for the following diseases-

a) Diabetes mellitus b) Gigantism

b) Creatinism d) Goiter 2

9. Explain a) Vertebrochondral ribs b) Osteoporosis

OR

Explain the structure of a myofibril. 2

SECTION – C

10. a) Write any two features of Pteridophyteswhich are not found in Bryophytes.

b) With reference to the kingdom Fungi, define the terms- Dikaryon and Mycelium.

3

11. Draw a well labelled diagram of Female reproductive system of Cockroach. ( at least

six correct labels) 3

12. Differentiate between---

a) Apocarpous and Syncarpous ovary

b) Racemose and Cymose inflorescence

c) Fibrous and adventitious roots 3

13. a) What isendarchcondition ?

c) Give the exact location and function of Bulliform cells. 3

14. Fill in the blanks at (A), (B), (C), and D as shown in the diagram. Name the chemicals/

structures present in part D which are also present in Mitochondria. 3

15. a) Mention any four important features of Watson and Crick model of DNA.

b) How does temperature affect an enzyme catalysed reaction ? 3

16. a) Name and explain the bond which polymerises the different amino acids to

form a protein.

b) Name the storage polysaccharides of plants and animals.

c) What is a competitive inhibitor with reference to an enzyme ? 3

OR

Describe the primary , secondary and tertiary structure of proteins.

17. Trace the events starting from coming in contact of Rhizobium to a leguminous root

till nodule formation. Add a note on the importance of leghaemoglobin. 3

18. What is Photophosphorylation ? Draw a Z scheme of light reaction. 3

19. What is a synapse ? Explain the process of transmission of impulse at the

synapse. 3

20. Explain the process of urine formation in humans with the help of a suitable diagram

and with special reference to the role of PCT, Henle’s loop, DCT and collecting duct

in the above said process. 3

SECTION – D 21.You might have observed that while making salad, your mother always washes the

cucumber, tomato etc. before cutting and then putting a pinch of salt just before

eating. Based on this observation, answer the following questions-

a) What happens after adding salt to the salad ?

b) Name the process involved in this.

c) What will happen if the salad with salt is kept for a long time?

d) What values are shown in this observation. 4

SECTION – E 22. Why Mitosisis called an equational division ? Enumerate the events during each

stage of mitosis and draw any two stages of your choice. 5

OR

A) Explain the following terms with reference to meiosis-

(i)Synapsis (ii) Crossing over (iii)Chiasmata

B) How does Anaphase I of meiosis and Anaphase of mitosis differ (two difference)

23. Give the diagrammatic / schematic representation of C4 pathway. Name any two

plants where it occurs. Also mention the difference in structure of chloroplast in

mesophyll cells and bundle sheath cells of such plants. 5

OR

What is glycolysis? Where does it occur ? Give the schematic representation of

glycolysis with special reference to ATP and NADH used/ produced.