ENGLISH CORE CLASS: XI

ENGLISH CORE

CLASS: XI

HOLIDAY HOMEWORK

1. Read the following books and write a book review.

(a) Train to Pakistan by Kushwant Singh

(b) Cry,The Peacock by Amitav Ghosh

2. Read the passage carefully and answer the questions that follow.

The other day we heard someone smilingly refer to poets as dreamers. Now, it is

accurate to refer to poets as dreamers but it is not discerning to infer as this person did

that the dreamers or poets are just as practical as people who build bridges or look into

microscopes are just as close to reality and truth. They differ from the logician and the

scientist is in the temporal sense alone. They are ahead of their time, whereas logicians

and scientists are abreast of their time. We must not be superficial that we fail to discern

the practicability of dreams. Dreams are the sunrise streamers heralding a new day of

scientific progress, another forward surge.

Every forward step man takes in any field of life is first taken along the

dreamy

paths of imagination. Robert Fulton did not discover his steam boat with full steam up,

straining at hawser at some Hudson River dock. First he dreamed the steam boat and then

scientific wisdom converted a picture in the mind into reality of steel and wood.

The automobile was not dug out of the ground like a nugget to gold, first men

dreamed the automobile and afterwards, practical- minded engineers caught- up with

what had been created by winging fantasy. He, who looks deeply and with a seeing eye

into the poetry of yesterday, finds there all the cold scientific magic of today and much

which we shall not enjoy until some tomorrow. If the poet does not dream so clearly that

blue prints of this vision can immediately be drawn and the practical conversion

immediately effected, he must not for that reason be smiled upon as merely the mental

host for a sort of harmless madness. For the poet, like an engineer, is a specialist.

His

being turned to the life of tomorrow, cannot be turned simultaneously to the life of today.

To the scientist he says, “Here, I give you a flash of the future”. The wise scientist thanks

him and takes that flash of the future and makes it over into a fiber of today.

(a) On the basis of your reading of the above passage, make notes on it, using headings

and sub-headings. Use recognizable abbreviations wherever necessary. Suggest a

suitable title.

(b) Write a summary of the above passage in about 80 words using notes made.

3. (1). Your school is organizing a fete to collect funds for charity. Only school students are

eligible to put up stalls. As Head Boy / Head Girl of the Meera International School, draft

a notice in not more than 50 words to be put up announcing sale of stalls giving all other

necessary details.

(2). You want to dispose of your car, as you are going abroad. You are Harish of No.10,

Kailash Ganj, Lucknow. Draft an advertisement to be published in the daily ‘The

Hindustan Times’, under classified columns.

4. (1).You are Amita Sood. You saw an advertisement about a course in spoken English ,

published in ‘The Hindu’ by ‘A to Z in English’, 22, Gandhi Nagar , Chennai- 20 . You

wish to join the course. Write a letter to the advertiser, enquiring about the details

you

require.

(2).You are Rohit / Rohita , your group, under the supervision of your art teacher ,

is

working on landscaping the garden of your school . You had ordered stones and bricks

for it but now you require more stones for the project. Write a letter to M/S Tiwari

Building Material to send you more stones and bricks.

5. (1). You are Rohit / Rohita and applying for higher studies in Canada. Write a brief

personal profile and statement of purpose for applying for a Study Visa. Write about

yourself, mentioning your strengths and reason / purpose for the course enrolled for.

(2). You , Amritha , happened to take part in a medical camp organized by your club in a

remote village in Bihar. You are surprised to find that most of the people there have no

awareness of basic health or hygiene. As a concerned citizen, you decide to take up their

cause and organize camps where the villagers can be told about the importance of

hygiene. Taking ideas from the notes given below and the unit on ‘Health and Hygiene’

along with your own ideas, write a letter to the editor of a newspaper about the problem

encouraging youngsters to join in the campaign.

causes for ill health

regular discussions and camps to be held

a small dispensary to be set up

youngsters to volunteer.

6. (1).The number of vehicles has increased in your city thus polluting the environment. A

great many people have been complaining about the problems related to lungs and

hearing impairment. Write a speech in about 150 words, to be delivered on the ‘World

Environment Day’.

(2).You are Menaka / Manik .You strongly feel that the Indian Government is not taking

adequate steps to promote tourism in India which could turn out to be one of the major

revenue earning industries. Write an article in 150-200 words for a magazine giving your

ideas on the steps the Indian Government could take to promote tourism aggressively.

7. The passage has been given below. It has not been edited. There is one error in each

line. Write the incorrect words and the correction against the correct blank number

in your answer sheet. The first one has been done for you as an example.

Incorrect Correct

The passenger were waiting at the e.g.; passenger passengers

station when five policemen rushing (a) ………..... …………..

into difference compartments of a (b)…………. …………..

train . After sometimes one of them (c)………….. …………...

comes out with two young men (d)………….. …………...

and soon the other policemen joined her.

8. Correct the errors in the following sentences and rewrite the correct sentences:

(a) Bread and butter are a common breakfast.

(b) The same year he joined the club 300 by score 375 runs.

(c) I was surprised on his late arrival.

(d) I picked up the orange and went out..

9. Write a poem/article/an experience of your own for the school magazine

10. Make a separate file for Art Integrated Education (AIE) – Compose poems on culture,

artists, song and dance skills, COVID and nature with illustrations / pictures.

11. Solve the Unit Test Paper

Do the following in A4 sheet and file them. The work should be submitted on

the

reopening day.

“A DREAM WRITTEN DOWN WITH A DATE BECOMES A GOAL.A GOAL

BROKEN DOWN INTO STEPS BECOMES A PLAN.A PLAN BACKED BY ACTION

BECOMES REALITY.”

HOLIDAY ASSIGNMENT-CLASS XI B(2020-2021) SUBJECT - CHEMISTRY

WRITE DOWN THE ANSWERS FOR THE FOLLOWING QUESTIONS IN A4 SIZE

PAPERS AND FILE IT. 1. Draw modern periodic table neatly in a chart paper.

2. Write complete and short form subshell configuration of first 30 (atomic number 1 to 30) elements

3. a) NO and NO2 are two oxides of nitrogen.

i) Which law of chemical combination is illustrated by these compounds?

ii) State the law.

b) Calculate the mass of a magnesium atom in grams.

c) What is molality?

4. Empirical formula represents the simplest whole number ratio of various atoms present in a

compound.

i) Give the relation between empirical formula and molecular formula.

ii) An organic compound has the following percentage composition C = 12.36%, H = 2.13%,

Br = 85%. Its vapour density is 94. Find its molecular formula.

iii) What is mole fraction?

5. When nitrogen and hydrogen combines to form ammonia, the ratio between the volumes of

gaseous reactants and products is 1: 3: 2. Name the law of chemical combination illustrated here.

6. A compound is made up of two elements A and B, has A = 70% and B = 30%. The relative number

of moles of A and B in the compound are 1.25 and 1.88 respectively. If the molar mass of the

compound is 160, find the molecular formula of the compound.

7. 12 g of 12C contains Avogadro’s number of carbon atoms.

i) Give the Avogadro’s number.

ii) The mass of 2 moles of ammonia gas is .........

8. ‘A given compound always contains exactly the same proportion of elements by weight.’

(i) Name the above law. (ii) Write the name of the Scientist who proposed this law.

9. Calculate the number of molecules in each of the following:

i)1 g N2 ii) 1 g CO2 (Given that NA is 6.022 x 1023, molecular mass of N2 = 28 and CO2 = 44)

10. Mole is a very large number to indicate the number of atoms, molecules etc.Write another name

for one mole.

11. i) How the molecular formula is different from that of empirical formula?

ii)An organic compound on analysis gave the following composition. Carbon = 40%,

Hydrogen = 6.66% and oxygen = 53.34%. Calculate its molecular formula if its molecular

mass is 90. 12. The laws of chemical combination are the basis of the atomic theory.

a) Name the law of chemical combination illustrated by the pair of compounds, CO and CO2.

b) State and explain the law of conservation of mass.

13. Calculate the molarity of a solution containing 8 g of NaOH in 500 mL of water.

14. Explain quantum numbers. Give the importance of quantum numbers in Pauli’s Exclusion Principle.

15. Mention two observations which could not be explained by wave nature of electromagnetic

radiations.

16. The minimum value for the product of uncertainties in position and momentum of a moving

microscopic particle is equal to ..........

17. What are the important observations and conclusions made by Rutherford from his alpha ray

scattering experiment? Give any two limitations of Rutherford’s nuclear model of atom.

18. Represent the orbital with quantum numbers n = 5 and l = 3.

19. The threshold frequency for a metal is 7.0 x 1014 S-1. Calculate the kinetic energy of an emitted

electron when radiation of frequency (ν) 1.0 x 1015 S-1 hits the metal.

20. Give the IUPAC name of the element with Atomic number 117.

21. In the modern periodic table elements in a given group have similar chemical properties. Give

reason

22. Account for the following :

i)The ionic radius of fluoride ion (F-) is 136 pm, while the atomic radius of fluorine (F) is

only 64 pm.

ii)The second ionization enthalpy of an element is always greater than that of the first

ionization enthalpy. 23. Chlorine has the most negative electron gain enthalpy'. Justify the statement.

24. Identify the positions of Al (z=13) and S (z=16) in the periodic table with the help of their

electronic configurations. Predict the formula of the compound formed between them.

25. Among N3-, O2-, F-, Na+ and AI3+, which one has the smallest size?

INSTRUCTIONS

Write all the questions in A4 size paper except question number 1. Question number 1 should be in Chart paper Assignments must be submitted on the first day when the school reopens The front sheet should have your full name, class and roll number.

BIOLOGY- HOLIDAY ASSIGNMENT Answer the following questions:

1- Differentiate between (i) ureotelism and uricotelism.

(ii) PCT and DCT

2- What are the symptoms of exophthalmic goitre?

3- What will be the PO2 in the atmospheric air compared to those in the alveolar air?

4- Where are thrombocytes formed in a human body?

5- Name the four hormones involved in the regulation of kidney function.

6- What are myofibrils?

7- How is the nucleic acid fraction of our food digested?

8- How are polysaccharides and disaccharides digested?

9- Give the values of each of the following: (a) Po2 of (i) alveolar air (ii) deoxygenated blood and

(iii) oxygenated blood.

10- Name the factors that favour the dissociation of oxyhaemoglobin.

11- Describe the evolutionary changes in the pattern of heart among the vertebrates.

12- Draw a standard ECG and explain the different segments in it.

13- Explain the chemical events that take place to form a clot to seal the wound.

14- Why is it necessary to check the Rh-factor of the blood of a pregnant woman?

15- Explain the autoregulatory mechanism of GFR.

16- Give a brief account of the counter-current mechanism.

17- Write the difference between pectoral girdle and pelvic girdles.

18- Draw a diagram of human skull and label ten parts in it.

19- What is the role of sarcoplasmic reticulum, myosin head and F-actin during contraction of

striated muscles of humans?

20- Diagrammatically indicate the location of the various endocrine glands in the body of a human

male and human female.

21- Mention any four activities regulated by the estrogen hormone.

22- What is Addison’s disease? Mention its symptoms.

23- Who proposed the cell theory? Give the main points of this theory understood today.

24- Name and describe the two types of glycocalyx found in bacterial cell.

25- Describe the four types of chromosomes based on the position of centromere.

HOLIDAY ASSIGNMENT

COMPUTER SCIENCE (XIB ) 1. What are ASCII and ISCII? Why are they used?

2. Convert the following binary numbers to decimal: (a) 1010 (b) 111010.

3. Convert the following decimal numbers to binary: (a) 145 (b) 23.

4. Convert the following binary numbers to hexadecimal: (a) 1111011101011011 (b)

11010111010111.

5. Convert the following hexadecimal numbers to binary: (a) 9BC8 (b) 7AB4.

6. Convert the following octal numbers to binary: (a) 3527 (b) 7642.

7. Convert the following binary numbers to octal: (a) 110110101 (b) 111010111.

8. Convert the following decimal numbers to hexadecimal: (a) 132 (b) 2352.

9. Convert the following hexadecimal numbers to decimal: (a) A13B (b) 7CA3.

10. Convert the following hexadecimal numbers to octal: (a) 38AC (b) 7FD6.

11. Make table containing the summary of all the Laws and theorems of Boolean algebra.

12. Prove the DeMargan’s theorems with the help of truth table.

13. Tabulate the differences between compiler and interpreter.

14. What is cyber-crime? Explain about cyber bullying and cyber stalking. What is identity fraud?

15. List the threats to computer security. Briefly explain any three of them.

INFORMATICS PRACTICES(065) CLASS XI -B

1. What do you mean by a Database Management System? 2. What do you mean by Relational database? 3. What is primary key? 4. What do you understand by the terms degree and cardinality of a relation in relational data base? 5. Write MySql command that will be used to show all the databases which is already created inMySql. 6.Write the queries for the following: a. Modify the last name of employee3, to punia b. Remove the entire contents of the table c. Change the data type of column pin code to varchar(10) in the table customer d. Add a primary key constraint to the table employee2 using the empid column. e. List all department numbers in table empl. f. How many job types are offered to employees? g. To display the name, job title and salary of employee who do not have manager. h. To display name, age and marks (aggregate) of students whose age is greater than or equal to 16 from table student. i. To list the employees’ details whose grade are other than G1 . j. To display the structure of table student. 7.Answer the question based on the table given below: Table:STUDENT

Write the SQL command to create the above table with constraints. (i)Insert 2 records with relevant information, in the table student (ii) Display all the records of the table Student. (iii)Delete the Student Whose Roll no is 100. (iv) Change the Stream of Student to ‘Computer’ Whose Roll no. is 536. (v) Add one column email of data type VARCHAR and size 30 to the table Student. (vi) View structure of the table created by you. (vii) Drop the table Student. (viii) Make the all changes permanently. 8. Zridung wants to list the names of all the tables in his database namely Student. What command should he write at MySQL prompt to get this result? 9.Ms Marina wants to remove the entire content of a table “CBSE” but not its structure. For this he worte following MySQL command: DELETE * FROM CBSE; Was it correct?

10. Rahul wants to create a table STUDENT which can store Roll number, name, address and percentage in SQL. Write the command to create the table STUDENT (Decide the type and size of column on your own).

HOLIDAY ASSIGNMENT

MATHEMATICS

1. Prepare notes and do the exercises of the lesson Introduction to Three Dimensional Geometry.

2. In a survey of 200 students of a school, it was found that 120 study Mathematics, 90 study

Physics and 70 study Chemistry, 40 study Mathematics and Physics, 30 study Physics and

Chemistry, 50 study Chemistry and Mathematics and 20 , none of these subjects. Find the

number of students who study all the three subjects.

3. In a town of 1000 families, it was found that 40% families buy newspaper A, 20% families

buy newspaper B, 10% families buy newspaper C, 5% families buy A and B , 3% buy B and C

and 4% buy A and C. If 2% buy all three newspapers, find

(i) the number of families buy newspaper A only

(ii) the number of families buy none of A , B and C.

4. In group of 50 students, the number of students studying French , English and Sanskrit were

found to be as follows. French 17, English 13, Sanskrit 15, French and English 9, English and

Sanskrit 4, French and Sanskrit 5, English , French and Sanskrit 3. Find the number of students

who study (i) only French (ii) English and Sanskrit but not French (iii) at least one of the

languages (iv) none of the three languages.

5. Find the domain and range of the function (i) f(x) = (ii) f(x) =

6. If a function f : R R be defined by f(x) =

Find f(1), f(-1), f(0) and f(2).

7. If f(x) = x + , prove that [ f(x) ]3 = f(x

3) + 3 f ( )

8. If f is a real function defined by f(x) = , then prove that f(2x) =

9. Solve the following system of inequalities and represent the solution graphically on a number

line.

(i) 2(2x + 3) – 10 < 6(x – 2) and + 6 ≥ 4 +

(ii) > 3 and < - 11

(iii) < 5 and > 2 (iv) 2(x + 1) < x + 5 and – 1 ≤ 4 - x

PHYSICS (042)-HOLIDAY ASSIGNMENT

1. The radius of atom is of the order of 1 Å and radius of nucleus is of the order of fermi.

How many magnitudes higher is the volume of atom as compared to the volume of

nucleus?

2. Express unified atomic mass unit in kg.

3. Measure of two quantities along with the precision of respective measuring instrument is

A = 2.5 m ± 0.5 m B = 0.10 m ± 0.01 m. Find the value of A+B and A-B.

4. The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. Find

the area of the sheet in appropriate significant figures.

5. A ball is dropped and its displacement vs time graph is as shown Fig. (displacement x is

from ground and all quantities are +ve upwards).

(a) Plot qualitatively velocity vs time graph.

(b) Plot qualitatively acceleration vs time graph.

6. A ball is dropped from a building of height 45 m. simultaneously another ball is thrown up

with a speed 40 m/s. Calculate the relative speed of the balls as a function of time.

7. When an observer is standing on earth, the tree and houses appear stationary to him. However,

when he is sitting in a moving train, all these objects appear to move in backward direction.

Why?

8. Distinguish between average acceleration and instantaneous acceleration.

9. Three girls skating on a circular ice ground of radius 200 m start from a point P on the edge of

the ground and reach a point Q diametrically opposite to P following different paths as shown in

Fig. What is the magnitude of the displacement vector for each? For which girl is this equal to

the actual length of path skate?

10. A fighter plane is flying horizontally at an altitude of 1.5 km with speed 720 km/h. At what

angle of sight (w.r.t. horizontal) when the target is seen, should the pilot drop the bomb in order

to attack the target?

11. Rain is falling vertically with a speed of 30 m s-1. A woman rides a bicycle with a speed of

10 m s-1 in the north to south direction. What is the direction in which she should hold her

umbrella ?

12. The ceiling of a long hall is 25 m high. What is the maximum horizontal distance that a ball

thrown with a speed of 40 m s-1 can go without hitting the ceiling of the hall ?

13. A stone tied to the end of a string 80 cm long is whirled in a horizontal circle with a constant

speed. If the stone makes 14 revolutions in 25 s, what is the magnitude and direction of

acceleration of the stone ?

14. A block of mass 10 kg is sliding downwards on a inclined plane of angle 30° with horizontal.

The coefficient of kinetic friction between the block and surface is .5. Find the acceleration of

the block (take g=9.8 m/s2)

15. A river is flowing due east with a speed 3m/s. A swimmer can swim in still water at a speed

of 4 m/s

a) If swimmer starts swimming due north, what will be his resultant velocity (magnitude

and direction)?(b) If he wants to start from point A on south bank and reach opposite

point B on north bank,

(i) which direction should he swim?

(ii) what will be his resultant speed?

16. A man standing on the edge of a cliff throws a ball straight up with a speed of 8 Km/h and

then throws a ball down with a speed of 8 Km/h from the same position. What is the ratio of

speeds with which the ball hit the ground.

17.An object of 100kg mass is kept on an elevator surface. The elevator is moving with a

constant velocity of 3m/s. What is the normal reaction on the object in Newton?

18.A 40kg boy is moving upwards in a lift with an acceleration of 2 m/s-2

.What would be the

weight felt by him,if measured in as scalar?

19.A 70 Kg old person is moving downwards in an elevator with an acceleration of 3 m/s-2

.What

would be the Normal Reaction on him applied by the elevator ground surface?

20. A block of mass 2 kg is placed on a plane surface. The coefficient of static friction is .4.

When a 2.8 N force is applied on the block parallel to the surface, find the force of friction

between the block and surface.