CLASS –VII ASSIGNMENTS

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SAINIK SCHOOL SATARA

ASSIGNMENT FOR THE SECOND WEEK OF JUNE

2020-2021

CLASS –VII

ASSIGNMENTS

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SUBJECT: ENGLISH

Chapter 1 Three Questions by Leo Tolstoy

Working with Text -Page No 14 ,15

Working with Page Language- page No 15 and 16

Extra Question: Imagine you are the king . Narrate the incident of meeting the

hermit.

Chapter 2. A Gift of Chappals

1. Comprehension check - Question No 1 and 2.

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SUBJECT: MARATHI

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SUBJECT: MATHS CLASS VII

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1. What is the value of (-22) – [(-22) – (-17) –(-61)].

2. What should be subtracted from -9876 to obtain -9512.

3. -36 ÷ ( _____) = 9 .

4. Which property is reflected in this equation 7 x 5 = 5 x 7.

5. Verify a- (-b) = a + b for the following values of a and b (a) a=34 , b= 73 (b) a = 45 and b =30

6. A group of hikers is descending the mountains at a rate of 600 feet per hour. What is the change in elevation of hiker after 6 hours?

7. Verify a) (-22) x [(-4) +(-5)] = [(-22) x (-4)] + [(-22) x(-5)] b) (-12) x [(3) + (-9)] =[(-12) x (4)] + [(-12) x (-9)

8. Write down the pair of integers whose (a) sum is -4 (b) sum is 0 (c) Difference is -6 (d) Difference

9. In a test (+6) marks are given for every correct answer and (-2) for every incorrect answer,0(zero) for answers not attempted. Ram gets 3 correct,4 incorrect out of 7 questions he attempted. What is his score?

10. Find the product of a) (-4) x(-3) x(-1) b) (-10 x(-20)

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SUBJECT: PHYSICS

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Assignment No -2

Class : VII (Physics)

Topic: Fibre to Fabric

Q.1 Why shearing is done before winter season?

Q.2 What are occupational hazards? Name one occupational hazard concerned to wool

industry.

Q.3 Write various steps for processing fibres into wool.

Q.4 How do the hair of certain animals help in keeping their bodies warm?

SUB - Chemistry

Q1 What does Calamine solution contain? Q2 Name the salt formed when hydrochloric acid neutralizes sodium hydroxide solution. Q3 What is an indicator? Name three indicators. Q4 What is an antacid? How does an antacid work? Name any one antacid . Q5 State the differences between acids and bases.

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SUBJECT: BIOLOGY

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Assignment No -2

Class: VII (Biology)

Topic: Nutrition in Plants

Q.1 What are the various raw materials required for photosynthesis?

Q.2 In the absence of photosynthesis, life would be impossible on earth. Is it true or

false?

Q.3 In the process of photosynthesis, which of the following energy conversion occurs?

a) Solar energy is changed into chemical energy.

b)Solar energy is changed into mechanical energy.

c) Bioenergy is changed into chemical energy.

d) Chemical energy is changed into light energy.

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HISTORY-ASSIGNMENT2 W2 CLASS:VII MNRAO

1 Who were the parties involved in the tripartite struggle?

2 How did Rashtrakutas become powerful?

3 What were the activities associated with the chola temples?

4 What kind of irrigation work were developed in the Tamil region ?

SUBJECT: GEOGRAPHY Class VII

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Q1-) What are the Fossils? Q2-) What is the distribution of interior of the earth in percentage? Q-3-) Write word origin and meaning of three types of rocks? Q4-) Draw a diagram of Interior of the earth. Q-5) Why we can not go to the centre of the earth?

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2020-2021

CLASS –VIII

ASSIGNMENTS

SUBJECT: ENGLISH

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English Homework ( KH Rasal) Week 2 (08 June to 13 June 2020 ) Class VIII Lesson 1. Part 1 Working with Language- Page 17, 18,19 Writing -Page 20 S. Reader Lesson 1 How the Camel Got His Hump Comprehension Check Page Number 3 and 5

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SUBJECT: MARATHI

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SUBJECT: MATHS CLASS VIII

Rational Numbers

1) Fill in the blanks i) Rational numbers are numbers of the form ______ where p and q are integer and q≠0. ii) Rational numbers are not closed under ________. iii) ________ is called additive identity of rational numbers iv) ________ is called multiplicative identity of rational numbers v) Zero has _____ Reciprocal vi) The numbers _______ and ________ are their own reciprocal.

vii) _______ is multiplicative inverse of313 .

viii) The rational number is equal to its negative is _______. ix) There are infinitely rational numbers between any two given rational numbers. x) The product of a number and its multiplicative inverse is _________. xi) The sum of a number and its additive inverse is ________. xii) The product of a number and its reciprocal is _____________. xiii) The product of number and multiplicative identity is _________. xiv) The sum of number and additive identity is _________. xv) Distributive property of multiplication over addition is __________. xvi) Distributive property of Multiplication over Subtraction is ________.

xvii)Multiplicative inverse of -243

is _________.

xvii) Additive inverse of -243

is ____________.

xviii) The product of two negative rational numbers is always _________.

xix) Multiplicative inverse of -2+43

xx) Additive inverse of -2+43

xxi) 2523

÷0=__________.

xxiii)0÷2523

=_________

2) Tick the correct alternative :

i) Which of the following rational numbers lies between 41

and 41

.

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a) 81

b) 82

c)82

d) 31

ii) 87

-

58

is

a) 4010

b) 4011

c) 4029

d) 31

iii) Which of the following is false statement? Where a , b and c are rational numbers

a) a÷b rational numbers b) -a÷a=-1 c) a÷(b÷c)≠(a÷b)÷c

d) (a-b)÷c=

cb

ca

iv) Commutative property of rational numbers states that a+b= a) a+b b) b+a c) a d) b

v) The additive identity of rational number is a) 0 b) 1 c)-1 d)-0

vi) Multiplicative inverse of 67

is

a) 67

b) 76

c) 76

d) -1

3. Evaluate using appropriate property

a) 75

35

35

23

75

b) 61

52

27

52

32

c) 41

21 +

31

41

715

187

d)

1658

45

e) 127

35

53

127

f)

1310

212

97

133

212

g)

914

1615

73

54

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SUBJECT: PHYSICS

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1. How many objects should be present for a force to come into play?

2. What happens to the speed of the body when a force is applied?

3. What is meant by muscular force? 4. Does the force of friction also act on objects moving in

the air? 5. Give one example of force which can act from a

distance.

SUBJECT: CHEMISTRY

Q1 What is meant by biodegradable and non biodegradable materials ? Q2 Why should we not wear clothes made of synthetic fibres while working in the kitchen ? Q3 Explain why plastic containers are preferred for storing food? Q5 Write two examples of thermosetting and thermoplastic.

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SUBJECT: BIOLOGY

Assignment No -2

Class: VIII (Biology)

Topic: Crop Production & Management

1. Define – Crop

2. Give two examples of each – a) Kharif Crop b) Rabi crop

3. Why is selection of seed is important before sowing?

4. Explain how fertilisers are different from manure.

5. Explain how soil gets affected by the continuous plantation of crop in a field.

SUBJECT: HISTORY- class VIII

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1 What attracted European countries to come to India?

2 Explain the system of subsidiary alliance.

3 In what ways was the administration of the company different

from that of Indian rulers?

4 Explain the system of doctrine of the Lapse.

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SUBJECT: GEOGRAPHY

Q1-) What do you mean by Land use pattern? Q2-) Why do the people in different parts of the world lead different Life? Q-3-) Explain the distribution of water on the land. Q4-) What are the main causes for water scarcity/problem in the world? Q-5) Explain three processes involved in soil formation and also name layers of soil. _________________________________________________________________



2020-2021

CLASS –IX

ASSIGNMENTS

SUBJECT: ENGLISH

English Homework ( KH Rasal) Class IX Week 2 (08 June to 13 June 2020 )

Reader Lesson 1. The Road Not Taken Thinking about the poem Page 16 S Reader Lesson 1. Difficult words with meanings

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SUBJECT: MARATHI

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SUBJECT: MATHS

Make a note that 0.625 bar on 25=0.625_____

1) Express following numbers in qp

form

(a) 0.625 (b) 0.625 bar on 5 (c) 0.625 bar on 25 (d) 0.625 bar on 625 (e) 0.0625 bar on 0625 (f) 2.625 bar on 625

2) Express following numbers on number line. (a) 3.2356 (b) 7.2647 (c) 5.35 bar on 5 till four decimal places (d) 0.27 bar on 27 till four decimal places

3) Write five irrational numbers between following numbers

(a) 75

and 119

b) 23

and 35

c) 23

and 115

d)75

and 119

4) Classify following numbers into Rational numbers and Irrational numbers

a) 225 b) 47 c) 5.625 bar on 625 d) 3.14141142143144… e) 7.236236236…

5) Express following numbers in qp

form

a) 2.9 bar on 9 b) 6.27 bar on 27

SUBJECT: PHYSICS

1. Difference between distance and displacement. 2. What do you mean by uniform motion.Give one example of a body having

uniform motion. 3. The distance time graph of a moving body is a straight line.What does it

mean. 4. Can distance travelled by a moving body be zero? 5. What is the SI unit of distance?

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SUBJECT: CHEMISTRY

Q1 A diver is able to cut through water in a swimming pool which property of matter does this observation show? Q2 What are the characteristics of the particles of matter? Q3 A gas fills completely the vessel in which it is kept. Explain why ? Q4 We can easily move our hand in air but to do the same through the solid block of wood we need a Karate expert. Explain why?

SUBJECT: BIOLOGY

BIOLOGY ASSIGNMENT -2 CLASS IX (SCT)

1) Define: Osmosis

2) Give any two differences between osmosis and diffusion.

3) What is isotonic solution?

4) What will happen if we put animal cell in hypotonic solution?

5) What is a cell made up of?

6) What is the effect of isotonic solution on plant or animal cell?

&) Give the functions of Plasma membrane.

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SUBJECT: HISTORY

1. Whose period is known as Reign of terror and why?

2. Describe the social circumstances leading to the outbreak of

revolutionary protest in France.

3. List any 3 changes brought by national assembly in France?

4. How did France became a constitutional Monarchy?

SUBJECT: GEOGRAPHY

IX –GEO-RAS- W2 JUNE

1. Define the following terms. Equator Pole South Pole North Pole Longitude Latitude Tropic or Tropical Zone Tropic OF Cancer Upanishads Indian Standard Time Prime Meridian Hemisphere Peninsula Gulf Isthmus Strait Continents province Corals Islands Princely States

2. Make list of States and Union Territories of India with their Capital and total geographical area.

3. On an outline map of India mark and label the places/items (Textbook page 6 map skills).

4. On an outline map of the world, mark the location of India. 5. What makes the third largest ocean in the world to be named after India? 6. Make the list of 15 largest nations of the world, write their capital also. 7. Describe how geographical features of India have fostered unity and

homogeneity in the Indian society. 8. Give the brief account of the Indian’s contact with the outside world in ancient

and medieval times. 9. What is the significance of India’s location in the world?

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10. Write the short answers of the questions mentioned on page 2 and 4 of the textbook in find out column.

11. Draw the bar graph on graph paper (fig 1.2 page 2 of textbook). 12. Collect the information about Suez Canal and Panama Canal. 13. Regular textbook exercises need to be completed accordingly.



2020-2021

CLASS –X

ASSIGNMENTS

SUBJECT: ENGLISH

Chapter 1 Dust of Snow (poem)

2 Dust of Snow (poem)

1Thinking about the Poem (exercise) Dust of Snow

Extra Question : Small things in life make significant changes in our life .Elaborate

2Thinking about the Poem (exercise) Dust of Snow

Extra Question : How will the world end. Support your answer with scientific

explanation.

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SUBJECT: MARATHI

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SUBJECT: MATHS

Assignment No 2. Class : X

Sub: Maths 14 June 2020 Polynomials

1. Find the zeros of the following quadratic polynomials and verify the

relationship between the zeros and the coefficients and zeros. (a) 풇(풙) = 풙ퟐ + ퟐ√ퟐ풙 − ퟔ (b) 푷(풙) = √ퟑ 풙ퟐ + ퟏퟎ풙 + ퟕ√ퟑ (c) 풇(풙) = 풙ퟐ − √ퟑ + ퟏ 풙 + √ퟑ (d) 품(풙) = 풂(풙ퟐ + ퟏ) − 풙(풂ퟐ + ퟏ)

2. If α and β are the zeros of the quadratic polynomial풑(풙) = ퟒ풙ퟐ − ퟓ풙 − ퟏ. Find the value of휶ퟐ휷 + 휶휷ퟐ.

3. If α and β are the zeros of the quadratic polynomial 풇(풕) = 풕ퟐ − ퟒ풕 + ퟑ Find the value of 휶ퟒ휷ퟑ + 휶ퟑ휷ퟒ .

4. If α and β are the zeros of the quadratic polynomial 풑(풚) = ퟓ풚ퟐ − ퟕ풚 + ퟏ Find the value of ퟏ

휶+ ퟏ

휷 .

5. If α and β are the zeros of the quadratic polynomial 풇(풙) = 풙ퟐ − 풙 − ퟒ Find the value of ퟏ

휶+ ퟏ

휷− 휶휷 .

6. Find the Quadratic polynomial whose zeros are reciprocal of the zeros of the polynomial풇(풙) = 풂풙ퟐ + 풃풙+ 풄,풂 ≠ ퟎ, 풄 ≠ ퟎ.

7. If α and β are the zeros of the quadratic polynomial 풇(풙) = 풙ퟐ − 풙 − ퟐ Find the polynomial whose zeros are 2α+1 and 2β+1.

8. If the sum of the squares of the zeros of a quadratic polynomial 풇(풙) = 풙ퟐ −ퟖ풙 + 풌 is 40, find the value of ‘k’.

9. If α and β are the zeros of the quadratic polynomial 풇(풙) = 풌풙ퟐ − ퟒ풙 + ퟒ such that 휶ퟐ + 휷ퟐ = ퟐퟒ Find the value of ‘k’.

10. If α and β are the zeros of the quadratic polynomial 풇(풙) = 풙ퟐ − ퟓ풙 + 풌 such that α-β=1. Find the value of ‘k.’

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SUBJECT: PHYSICS

1. How do we obtain coke? 2. Write two advantages of LPG. 3. Write any three precautions for using LPG. 4. Write the name of a substance that helps us in the

detection of leakage of LPG. 5. Write any two uses of CNG.

SUBJECT: CHEMISTRY

Q1 .Oil and fat containing food items are flushed with nitrogen.Explain why ? Q2 Explain the following terms with one example each- (i)corrosion (ii) Rancidity Q3 Shiny brown coloured element X on heating in air becomes black in colour. Name the element X and the black coloured compound formed. Q4 Explain the following terms on the basis of gain or loss of oxygen (i) oxidation (ii) reduction Q5 Name the chemical reaction in which heat is absorbed. Give one example. Q6 What is the decomposition reaction? Explain with one example.

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SUBJECT: BIOLOGY

BIOLOGY ASSIGNMENT-2 CLASS X (SCT)

1) What is parasitic mode of nutrition? Name any two parasites.

2) How saprophytic nutrition is different from parasitic nutrition?

3) What is an alimentary canal? Name the various parts of

alimentary canal.

4) What are the five steps of human nutrition?

5) What is peristaltic movement of food? Where does it take

place?

6) Name the site of complete digestion of food in human digestive

system.

7) What is digestion?

SUBJECT: HISTORY

1 Write short note about Aristocracy?

2 Define the term liberals, conservatives and radicals.

3 What did liberal nationalism stands for ?

4 Why did Duke Metternich describe GiuseppeMazzini as the most

dangerous

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SUBJECT: GEOGRAPHY

1. Define the following terms. Resources Abiotic Resources Biotic Resources Community based Resources National Resources International Resources Individual Resources Renewable Resources Non renewable Resources Stock Reserves potential Resources Actual Resources Developed resources Soil erosion Weathering Sheet erosion Shelter belt Counter Ploughing Terrace Farming Gully erosion Bad Lands Wind erosion

2. What do resources means? How are resources classified? 3. Describe the type of resources classified on the basis of

Exhaustibility. 4. Explain with the diagram how nature, technology and institutions

are interdependent? 5. Draw diagrams.

Fig 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 of textbook. 6. On an outline map of India mark the following

Area of Alluvial Soil Area of desert soil Area of red and yellow soil Ares of black soil ------------------------------------------------------------------------------------------------------

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2020-2021

CLASS –XI

ASSIGNMENTS

SUBJECT: ENGLISH

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ASSIGNMENT CLASS : XI ENGLISH RNP W2 JUNE 2020 THE SUMMER OF THE BEAUTIFUL WHITE HORSE 1. You will probably agree that this story does not have breathless adventure and exciting action. Then what in your opinion makes it interesting? 2. Did the boys return the horse because they were conscience-stricken or because they were afraid? 3.“I couldn’t believe what I saw,” says the narrator. What was so unbelievable? Why? 4.What two character-traits of Mourad are hinted at by the narrator in the initial part of the story? 5.“This was the part that wouldn’t permit me to believe what I saw.” What ‘part’ does the narrator hint at? 6. What traits of the Garoghlanian family are highlighted in this story? 7. What conflicting thoughts passed through the narrator’s mind on seeing Mourad on a beautiful white horse early one morning? 8. “It was true, then. He had stolen the horse. There was no question about it. He had come to invite me to ride or not, as I chose.” How did the narrator convince himself to enjoy a horseride with cousin Mourad? 9. Give examples to show why cousin Mourad was considered one of the craziest members of the narrator’s family?

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10. Why does the narrator mention uncle Khosrove? Which characteristic features of the man are highlighted? 11. How did uncle Khosrove react to John Byro’s complaint about the steal of his horse? 12.”A suspicious man would believe his eyes instead of his heart.” In what context was this observation made and by whom?

SUBJECT: MATHS

CLASS : XI SUB: MATHEMATICS

Ch.2. Relations & Functions ASSIGNMENT -1 Date: 11 June 2020

1. Find x and y , if (i) ,1 3,x y x y (ii) 2 1,2 7 3 7, 2x y y x

2. If 9,7A and 9,7,8B , find A B and .B A

3. If 3,3 , 3,4 , 5,3 , 5, 4A B , find the sets A and .B

4. If 4,n A 3,n B 24,n A B C find .n C

5. If 1, 2,3A , 2, 4B and 3,5C , find A B C .

6. If (1,3), (2,5) and (3,3) are three elements of A B and ( ) 6,n A B find the

remaining three elements of A B .

7. A is the set of even natural numbers less than 8 and B is the set of

prime numbers less than 7. Find the number of relations from A to B .

8. If 0,2,3, 4,6,7A , a relation R on A is defined as

, : , ; 2R x y x y A y x . Write R in roster form. Also write domain,

co-domain and range of R .

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9. Let R be a relation on the set of whole numbers W defined by

2 2, : , ; 25R a b a b W a b . Write R in roster form. Also write domain and

range of R .

10. Let 3,5A and 7,11B . Let {( , ) : , ;R a b a A b B a b is odd}. Show

that R is an empty relation from A to B .

……………………………..

SUBJECT: PHYSICS

PHYSICS ASSIGNMENT-2 CLASS XI MD WEEK-2 1. Two point charges 풒푨 = ퟑ흁푪 풂풏풅 풒푩 = −ퟑ흁푪 are located 20 cm apart in vacuum. . a) What is the electric field at the midpoint O of the line AB joining the two

charges? b) If a negative test charge of magnitude ퟏ.ퟓ × ퟏퟎ ퟗ푪 is placed at this point,

what is the force experienced by the test charge? 2. . An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? 3. Explain why two field lines never cross each other at any point? 4. Careful measurement of the electric field at the surface of a black box indicates that the net work outward flux through the surface of the box is= ퟖ.ퟎ × ퟏퟎퟑ푵풎ퟐ 푪⁄ a) What is the net charge inside the box? 5. A point charge +ퟏퟎ 흁푪 is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in fig. What is the magnitude of the electric flux through the square? (Hint: Think of the square as one face of a cube with edge 10 cm).

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SUBJECT: CHEMISTRY

HOME ASSGNMENTS - I

CLASS : XI SUB : CHEMISTRY

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Q.1 Carry out the following conversions :

a) 2.5 Litre to m3

b) 2 days to seconds

c) 38 0c to oF

Q.2 (a) what do you mean by significant figures

(b) Calculate the number of significant figures in the following :

1) 3.007 2) 0.00852 3) 2.0 4) 1.06

Q.3 Calculate the following:

a) (3 x 10 -7 ) + ( 4 x 10 -8 )

b) ( 2.5 x 10 4 ) – ( 0.28 x 10 6 )

c) (2 x 10 -7 ) x ( 5 x 10 -8 )

d) ( 36.5 x 10 6 ) / ( 0.458 x 10 8 )

Q.4 Explain the following laws :

a) Law of definite proportions

b) Law of multiple proportions

c) Gay Lussac’s law of gaseous volumes

d) Avogadros law

Q.5 Write the postulates of Daltons atomic theory.

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HOME ASSGNMENTS – II.

CLASS : XI SUB : CHEMISTRY(UKS)

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Q.1) Calculate the mass percent of calcium, phosphorus and oxygen in calcium

phosphate Ca3(PO4)2.

Q.2) 45.4 L of dinitrogen reacted with 22.7 L of dioxygen and 45.4 L of nitrous oxide

was formed. The reaction is given below:

2N2(g) + O2(g) → 2N2O(g)

Which law is being obeyed in this experiment? Write the statement of the law?

Q.3) The density of 3 molal solution of NaOH is 1.110 g mL-1 . Calculate the molarity

of the solution.

Q.4) If 4 g of NaOH dissolves in 36 g of H2O, calculate the mole fraction of each

component in the solution. Also, determine the molarity of solution (specific

gravity of solution is 1g mL-1 ).

Q.5) The reactant which is entirely consumed in reaction is known as limiting reagent. In the reaction 2A + 4B → 3C + 4D, when 5 moles of A react with 6 moles of B, then:

(i) which is the limiting reagent? (ii) calculate the amount of C formed? ___________________________________________________________________

SUBJECT: BIOLOGY


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ASSIGNMENT-2 (2020-2021)

SUBJECT- BIOLOGY(JMP)

CLASS-XI

1. Why classification is essential part of living organisms? 2. Define the following-

a) Division b) Class c) Order d) Species

Give examples of each of each of taxon. 3. Write the importance of each taxonomical aids. 4. What is the importance of nomenclature? 5. Write at least five scientific names of living organisms

SUBJECT : COMPUTER CLASS : XI

1. CARRY OUT FOLLOWING CONVERSION

(110111) 2 = ( ? ) 8

( 44 6) 10 = ( ? ) 6

(12 ) 10 = ( ? ) 2

2. EXPLAIN DECIMAL NUMBER SYSTEM. 3. WRITE DECIMAL AND BINARY EQUIVALENT NUMBER FROM 0

TO 11.

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2020-2021

CLASS –XII

ASSIGNMENTS

SUBJECT: ENGLISH

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ASSIGNMENT-II CLASS: XII ENGLISH :RNP W2 JUNE 2020 LOST SPRING—By ANEES JUNG 1. What is Saheb looking for in the garbage dumps? Where is he and where has he come from? 2. What explanations does the author offer for the children not wearing footwear? 3. Is Saheb happy working at the tea-stall? Explain. 4. What makes the city of Firozabad famous? 5. Mention the hazards of working in the glass bangles industry. 6. How is Mukesh’s attitude to his situation different from that of his family?. Understanding the text Q1. What could be some of the reasons for the migration of people from villages to cities? Q2. Would you agree that promises made to poor children are rarely kept? Why do you think this happens in the incidents narrated in the text? Q3. What forces conspire to keep the workers in the bangle industry of Firozabad in poverty? Q4. How, in your opinion, can Mukesh realise his dream? Q5. Mention the hazards of working in the glass bangles industry. Q6. Why should child labour be eliminated and how?

SUBJECT: MATHS

CLASS : XII Sub: Mathematics

Ch.2. Inverse Trigonometric Functions

ASSIGNMENT -1 Date : 11 June 2020

1. Find the principal value of 1 3cos2

.

2. If 1 3sin5

x

, find cos x .

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3. Find the value of 1 14 2tan cos tan5 3

.

4. Find x , if 1 1tan tan .2

a bx x

5. Find the value of 1 13cos cos6

.

6. Solve the equation: 1 1 1 1tan 1 tan tan 1 tan 3 .x x x x

7. Show that : 1 1 112 4 63sin cos tan13 5 16

.

8. Find x , if 1 1 11 1 1sin sin sin .x a b

9. Find the value of 1 1cos 2cos sinx x , if 1 .5

x

10. Find the value of 1 1cos cos 2cot 2 1 .

………………………………

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SUBJECT: PHYSICS

PHYSICS ASSIGNMENT-2 CLASS XII MD WEEK-2 1. Two point charges 풒푨 = ퟑ흁푪 풂풏풅 풒푩 = −ퟑ흁푪 are located 20 cm apart in vacuum. . c) What is the electric field at the midpoint O of the line AB joining the two

charges? d) If a negative test charge of magnitude ퟏ.ퟓ × ퟏퟎ ퟗ푪 is placed at this point,

what is the force experienced by the test charge? 2. . An electrostatic field line is a continuous curve. That is, a field line cannot have sudden breaks. Why not? 3. Explain why two field lines never cross each other at any point? 4. Careful measurement of the electric field at the surface of a black box indicates that the net work outward flux through the surface of the box is= ퟖ.ퟎ × ퟏퟎퟑ푵풎ퟐ 푪⁄ b) What is the net charge inside the box? 5. A point charge +ퟏퟎ 흁푪 is a distance 5 cm directly above the centre of a square of side 10 cm, as shown in fig. What is the magnitude of the electric flux through the square? (Hint: Think of the square as one face of a cube with edge 10 cm).

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SUBJECT: CHEMISTRY

HOME ASSGNMENTS - I

CLASS : XII SUB : CHEMISTRY

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Q.1 Define the following terms:

a) Mole Fraction

b) Molarity

c) Molality

Q.2 Calculate the Mole Fraction both the components of a solution when 25 gram

of urea (NH2CONH2) is dissolved in water to make 200 gram of a solution

Q.3 Calculate the Molarity of a solution when 40 gram of NaOH is dissolved in

water to 500 ml of a solution

Q.4 When 500 ml of 3 M solution is diluted to 900 ml, Calculate the Molarity of a

new solution.

Q.5 Calculate the :

a) Mole Fraction b) Molarity c) Molality

of 20 % solution of KI by mass ( Given: density of a solution = 1.020 gm/ml )

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HOME ASSGNMENTS – II (W2)

CLASS : XII SUB : CHEMISTRY(UKS)

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Q.1) Assuming the CO2 partial pressure in air above a lake at sea level is

4.0 x 10-4 atm, what is the equilibrium concentration of CO2 in the lake

at 25oC? (Henry’s law constant is 32 L . atm / mole)

Q.2) A solution is prepared by mixing 1.0 grams of benzene (C6H6) in 100 g

of water to create a solution total volume of 100 ml. Calculate the

molarity, mass percent, mole fraction, and molality of benzene in the

solution.

Q.3) What mass of NaCl are dissolved in 152 mL of a solution if the

concentration of the solution is 0.364 M?

Q.4) A mass of 98 g of sulfuric acid, H2SO4, is dissolved in water to

prepare a 0.500 M solution. What is the volume of the solution?

Q.5) Calculate the molalities of the following aqueous solutions:

a) 0.840 M sugar (C12H22O11) solution (density= 1.12 g/mL)

b) 4.91 M NaOH solution (density = 1.04 g/mL)

c) 0.79 M NaHCO3 solution (density = 1.19 g/mL)

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SUBJECT: BIOLOGY


ASSIGNMENT-2 (2020-2021)

SUBJECT- BIOLOGY( JMP)

CLASS-XII

1. Differentiate between oviparous and viviparous animals. 2. What is external and internal fertilization. Give examples. 3. What is pericarp? 4. Meiosis is an essential part of sexual life in any organism. Give two

reasons. 5. What are seasonal breeders and continuous breeders. Write examples

SUBJECT : COMPUTER CLASS XII

1. EXPLAIN THE NEED OF CYBER LAW. 2. EXPLAIN FILE TRANSFER PROTOCOL 3. WRITE DIFFERENCE BETWEEN SWITCH AND HUB.

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