GURU GOBIND SINGH PUBLIC SCHOOL , CHAS

ASSIGNMENTS FOR CLASS -12

SUBJECT : ENGLISH ( CORE ) SESSION 2020-21 DATE : 20/03/2020

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1. Write the Summary of Chapters :

FLAMINGO : 1. The Last Lesson

2. Lost Spring

3. Deep Water

VISTAS : 1. The Third Level

2. The Tiger King

3. Journey to the End of the Earth

11. Write the Paraphrase of the Poems in English :

1. My Mother at Sixty six

2. An Elementary School Classroom in Slum

3. Keeping Quiet

111. Write the Definition of the following Figures of Speech :

1. Simile

2.Metaphor

3.Personification

4. Repetition

5. Alliteration

6. Refrain

7. Irony

8. Rhyme Scheme

1V. Draft One example of each :

1. NOTICE 8. JOB APPLICATION

2.POSTERS 9. ARTICLE WRITING

3. ADVERTISEMENTS ( CLASSIFIED AND NON-CLASSIFIED ) 10. SPEECH WRITING

4. LETTER TO EDITOR 11. DEBATE WRITING

5. LETTER OF ENQUIRY

6. LETTER OF PLACING ORDER

7. LETTER OF COMPLAINT

NOTE : ALL THE ABOVE MENTIONED TOPICS SHOULD BE ACCOMPLISHED IN A LONG SIZE REGISTER DUELY COVERED AND TITLED BY

STUDENT

GURU GOBIND SINGH PUBLIC SCHOOLCHAS, BOKARO

Assignment Work (2020-21)

Class: XII MATHEMATICS

SECTION-A 1. Consider f :R→R given by f ( x )=4 x+3, find the inverse of f .2. On Z+¿ ¿, define a∗b=2ab, determine whether * is commutative or associative?

SECTION-B 3. Find principal value of tan−1√3−sec−1 (−2 ) .

4. Construct 4×3 matrix A=[aij ] whose element a ij is given by a ij=12|−3i+ j|.

5. If ¿√sin x+√sin x+√sin x+…∞ , then prove that dydx

=cos x2 y−1

.

6. Show that the relation R on the set A={1,2,3,4,5 } given byR={(a ,b ):|a−b|is even} is an equivalence relation.

7. Prove that

ta n−117+2 tan−1 1

3=π4

SECTION-C

8. If * is defined on the set R of real number by a∗b=3ab7

, find the identity

element in R for the binary operation *.

9. Prove the following by using properties of determinant

|a−b−c 2a 2a2b b−c−a 2b2c 2c c−a−b|=¿

10. f ( x )={|x|+3, if x ≤−3

−2 x ,if−3<x<36 x+2,if x>3

find the point of discontinuity.

11.If A=[3 27 5]∧B=[6 7

8 9], verify that ¿

12.If [1 −1 x ][0 1 −12 1 31 1 1 ] [

011 ]=0, find x .

SECTION-D

13.Solve the following system of equation by matrix method.2 x+ y+z=2 x+3 y−z=5

3 x+ y−2 z=6 14.If ¿ then prove that

dydx

=log tan y+ y tan x

log cos x−x sec y . cosecy

15.If x=acos θ+b sinθ and y=asinθ−bcosθ, then prove that

y2d2 yd x2

−xdydx

+ y=0

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Guru Gobind Singh public school Chas

Class 12 sub -physics

Assignment 2020

1. What is quantization of electric charge?

2. Give four properties of electric charge?

3. State coulomb’s law and express in vector form?

4. What is electric dipole moment? Is it a vector or scalar quantity?

5. find an expression for the electric field on axial line and on the equator line due to an electric

dipole.

6. Give two properties of electric field lines.

7. Derive an expression for the force and torque acting on electric dipole in uniform dimensional

electric field.In which situation torque on the dipole is 1)maximum and 2) minimum

8. Derive an expression for electric potential at any point due to an electric dipole.

9. What is electric flux? write its unit. is it a scalar or vector quantity?

10. Draw the electric field lines due to an electric dipole

11. Define equipotential surface.draw equipotential surface due to an electric dipole.

12. Write the four properties of equipotential surface.

13. State and prove gauss's theorem in electrostatic.

14. Using gauss’s theorem derive an expression for electric field due to charged spherical shell 1) on

the surface of the sphere 2)outside the sphere and inside the sphere .draw graph between E Vs

R.

15. Deduce coulomb's law using Gauss's theorem.

16. Find electric field intensity due to thin infinite plane sheet of charge using gauss law.

17.Derive an expression for the energy stored in a charged parallel plate capacitor. what is the form of

this energy and where from it comes ? find the expression for energy density of a charged capacitor.

18. Define capacitance of a conductor .obtain an expression for capacity of an isolated spherical

conductor.

19. Find the expression for capacitance of a parallel plate capacitor when 1) dielectric slab is inserted in

between the plates.2) a thin conducting slab is inserted in between the plates.3) a dielectric slab filled

the entire space between the plates

20.Two point charge + 6 q and -8 q are placed in the vertices Band C of an equilateral triangle ABC of

side a .obtain an expression for the magnitude and direction of resultant electric field at the vertex A

due to these two charges.

21Three charges each equal to q are placed at three corners of a square of side a .find the electric field

at the fourth corner?

22.Two charges 3 micro coulomb and -2 micro coulomb are located 15 CM apart. at what point on the

line joining the two charges is the electric potential zero ? Take the potential at infinity to be zero.

Guru Gobind Singh public school Chas

Class 12.

Assignment (CHEMISTRY)

1.Define a)mole fraction b) isotonic c)molality

2. State Henry law? Write two application?

3. State Raoult's law?

4. What is colligative property? Write its type and example of each?

5.if 20 gram of benzene is dissolved in 122 gram of carbon tetrachloride determine the mass percentage

of ccl4 and benzene?

6.if benzene in solution containing 30% by mass in ccl4 calculate the mole fraction of benzene?

7.To make 2.5 kg of 0.25 molar aqueous solution determine the mass of urea that is required?

8. If 1.202 gram per ml is the density of 20% aqueous KIi determine the following

a) Molality of. KI

b) molarity of KI

C) mole fraction of KI

9) Calculate the mass percentage of a solution which is obtained by mixing 300 gram of 25% solution

and 400 gram of 40% solution by mass?

10.if 92 gram of Na+ ion are present per kg of water determine the molality of Na+ ?

ion in the lake water which has density of 1.25 gram per ml

11. What will be the mass percentage of aspirin in acetonitrile be when 6.5 gram of Aspirin is dissolved

in 450 gram of acetonitrile?

12. To prepare250 ml of 0.15 M solution in methanol, determine the amount of benzoic acid that will be

required?

13. Define electrochemical cell?

14 what is the function of Salt bridge?

15. Define SHE?

16. Define electrochemical series? write its application?

17.Define a) oxidation b) reduction c) oxidizing agent d) reducing agent

18. Can we store copper sulphate solution in zinc vessel?

19.which is the best method to express the concentration of solution. molarity or molality?

Guru Gobind Singh Public School Chas Bokaro

Assignment For std XII 2020=21

subject: (Biology)

CH:05 principles of inheritance and variation

MAIN TOPICS:

1. Mendel’s experiment

2. Mendel’s law

3. Fpew exceptions to the mendel’s law

4. Chromosomal theory of inheritance

5. Linkage and recombination

6. Mandal disorders

7. Genetic disorders

8. Chromosomal disorders

9. Mechanism of sex determination

10. Sex determination in humans

11. Sex determination in honey bees

12. Mutation

13. Pedigree analysis

[Note: write short notes on above mentioned topics]

Important questions:

1.Mention the advantages of selecting pea plant for experiment by Mandal.

2. Differentiate between the following:

(a). dominance and recessive

(b) Homozygous and heterogeneous

(c) monohybrid and dihybrid

3. Explain the law of dominance using a monohybrid cross

4.Define and design a test cross.

5. Briefly mention the contribution of th Morgan in Genetics .

6.What is Pedigree analysis ? Suggest How such an analysis can be useful .

7.How is sex determined in human beings?

8.Explain the following terms with example

(a) codominance

(b) incomplete dominance

9.What is a point mutation ? Give an example .

10. Mention any two autosomal genetic disorders with their symptoms.

CH:06 molecular basis of inheritance

MAIN TOPICS:

1.Search for genetic material

2.DNA and RNA

3.Central dogma

4.replication

5.transcription

6.translation

7. Human Genome Project

8.DNA fingerprinting

9.genetic code

10 mutation

11.t-RNA

12.ribosome

13 regulation of gene expression

[note :write short notes on above mentioned topics]

Important questions :

1.Group the following as nitrogenous bases and nucleotides :

Adenine cytidine thymine guanosine uracil and cytosine.

2 If a double stranded DNA has 20% of cytosine, calculate the percentage of adenine in the DNA .

3 Which property of DNA double helix LED Watson and Crick to hypothesize semiconservative mode

of DNA replication? Explain

4. How did Hershey and chase differentiate between DNA and protein in their experiment while

proving that DNA is genetic material ?

5. List two essential roles of ribosome during translation .

6.why is the Human Genome Project called a mega project ?

7.what is DNA fingerprinting ?mention its application

8. Briefly describe the following: transcription, polymorphism, translation ,bioInformatics.

GURU GOBIND SINGH PUBLIC SCHOOL, CHASSub. – Comp. Sc.Class – XII

Q. 1 – What do you mean by Software ? What are different types of softwares? Explain them.

Q. 3 - What are logical operators in Boolean Logic ? Show their evaluation by using truth table.

Q. 4 - Using Boolean Logic, verify using truth table -X + X.Y = X for each X , Y in [0,1]

Q. 5 - Explain Principle of duality.

Q. 6 - Prepare truth table for following Boolean Expression – X . ( Y + Z ) + X . Y

Q. 5 – Convert – a) (200.375)10 = (?)2 b) (1101.000101)2 = (?)10 c) (266.375)10 = (?)8

d) (24.6)8 = (?)10 e) (5431.254)8 = (?)2 f) (11110001.101)2 = (?)8

g) (214.03125)10 = (?)16 h) (AE.5C)16 = (?)2 i) (10101110.010111)2=(?)16

Q. 6 - Write a program in Python

a) To take input of 3 numbers and print the largest no.b) to find the sum of series – 1 + 3 + 5 + 7 +.......... up to n termsc) to find the sum of series - 1 + 1 + 2 + 3 + 5 + 8 + .......... up to n terms.d) to evaluate n ! (factorial of n)e) to take input of a year and print whether it is leap year or not.f) to take input of a number and print whether it is prime or not.g) to print triangles like below (no of lines n should be taken as input) –

(i) * (ii) ** * * ** * * * * ** * * * * * * *

(iii) 11 21 2 31 2 3 4

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Guru Gobind Singh public school Chas

Assignment for first formative test

Class 12. Subject Accountancy.

Topic Financial statements of NOT FOR PROFIT MAKING ORGANISATION

Q1. What is a not for profit organisation

Q2. Not for profit organisation have some distinguish features from that of profit organisation. State

any five of them

Q3. Give the main sources of income of not for profit organisation

Q4. What are membership subscription

Q5. What is the accounting procedure for not for profit organisation.

Q6. name any two financial statement required to be prepared by not for profit organisation at end of

the year.

Q6. What is receipt and payment account

Q7. Write down the difference between cash book and receipt and payment

Q8. On what basis receipt and payment account is prepared

Q9. Give example of revenue receipts and capital receipts

Q10. Give example of revenue expenditure and capital expenditure

Q11. What is income and expenditure

Q12. Why income and expenditure account is prepared

Q13. State the nature of income and expenditure account

Q14.write down the differences between income and expenditure account and profit and loss account

Q15.write down the differences between receipt and payment account and income and expenditure

account

Q16. On what basis income and expenditure account is prepared.

Q17. Explain the following terms

1.Subscription. 2. life membership fee 3.legacy 4. Honorarium 5. Government grants

Q18.calculate amount of subscription which will be treated as income for the year ended 31st March

2020 for each of the following cases

Q19. Calculate the amount of sports material to be transferred to income and expenditure account

office sport club New Delhi for the year ended 31st March 2020

Q20. How are the following information will be shown in the final account of a sports

Q21. Following is the receipt and payment account of sports club prepare income and expenditure

account and balance sheet as on 31st March 2015

Guru Gobind Singh Public SchoolChas, Bokaro

Class XII Economics Assignment (2020 – 21)

Part A – Introductory Macro Economics

Unit 1 – National Income & Related Aggregates

Q.1 Define the following terms: - (a) GDP at market price(b) NDP at factor cost(c) GNP at market price(d) NNP at factor cost

(e) Factor Income(f) Transfer Payment(g) Net factor income from abroad(h) Net indirect taxes(i) Compensation of employee(j) Operating Surplus

Q.2 Distinguish between: -

(a) Factor Income and Transfer Income(b) Real Flow and Money Flow(c) Stock Variable and Flow Variable(d) Intermediate Goods and Final Goods(e) Real GDP and Nominal GDP

Q.3 Explain the concept of: -

(a) Domestic Territory and Normal Residents of a country(b) Circular flow of income in two sectors of economy.(c) Circular flow of income with help of three basic activities(d) Value added with help of an example.

Q.4 Explain any four limitations of using GDP as a measure/ index of welfare of a country.

Q.5 Explain the steps involved in estimating National Income by: - (a) Income Method(b) Expenditure Method(c) Value Added Method

Q.6 What precautions are necessary to be taken while estimating National Income by using: -

(a) Income Method(b) Expenditure Method(C) Value Added Method

Part B – Indian Economic Development

Unit 1 – Development Experience (1947 – 1990) and Economic Reform since (1991))

Q.1 Define following terms: -

(a) Stagnant Economy(b) Subsistence Agriculture(c) Occupational Structure

(d) Infant Mortality Rate(e) Economic Growth(f) Economic Development(g) LPG Policy(h) Fiscal Deficit(i) Green Revolution(j) Outsourcing

Q.2 Explain the causes of backwardness of Indian economy at the time of independence.

Q.3 Explain the features of India’s Demographic profile during the British rule.

Q.4 State any four components of: - (a) Institutional reforms (b) Technical reforms in Indian agriculture

Q.5 Describe the features of Economic planning in India.

Q.6 Explain the long term objectives of economic planning as persuade in India.

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Guru Gobind Singh Public SchoolChas, Bokaro

Class XII Physical Education Assignment

Q.1 Write and learn the definition of Physical Education?

Q.2 What do you mean by Planning in Sports? Write and learn its objectives.

Q.3 What are the different types of tournaments? Write and learn advantages and disadvantages of it.

Q.4 What is fixture?

Q.5 What do you mean by byes? Write and learn the rules of giving byes.

Q.6 What do you mean by Intramural and Extramural?

Q.7 Explain the formation of committees and its responsibilities Pre, during and post competitions or sports events.

Q.8 List down various specific sports programmes and explain any two in detail.

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