MPVM GANGA GURUKULAM

HOLIDAY HOMEWORK 2019-20

SUB: ECONOMICS CLASS 12

Q.1 Make a project from the following topics:(any one topic)

a. Multiplier and its Application in the Indian Economy

b. Cost and Benefit of GDP Growth

c. Demonetisation in India

d. Pros and Cons of GST

e. Problem of Unemployment in India.

f. Public Health Expenditure In India.

g. Breaking the vicious circle of poverty in the Indian Economy.

h. Problem of Unemployment in India.

WORKSHEET

Q.2 Government of India has recently launched ‘Jan-Dhan Yojna’ aimed at every household in the country to have

at least one bank account. Explain how deposits made under the plan are going to affect National Income of the

country.

Q.3 Calculate sales from the following.

S.No Contents Rs (in lakhs)

1. Subsidies 200

2. Opening Stock 100

3. Closing Stock 600

4. Intermediate Consumption 3000

5. Consumption of Fixed Capital 700

6. Profit 750

7. Net Value Added at Factor Cost 2000

Q.4 Find out (i) Gross National Product at Factor cost.

Items Rs in crores

Indirect tax 50

Net factor income from abroad (-)20

NDP at factor cost 480

Subsidies 10

Consumption of fixed capital 60

Net current transfer paid to ROW 30

Q.5 Giving reason, explain how should the following be treated in estimation of National Income:

(a) Expenditure by a firm on payment of fees to a Chartered Accountant.

(b) Payment of corporate tax by firm for own use.

(c) Purchase of refrigerator by firm for own use.

Q.6 Calculate National Income

S.No Contents Rs (in crores)

1. Personal Tax 80

2. Private Final Consumption Expenditure 600

3. Undistributed Profits 30

4. Private Income 650

5. Government Final Consumption Expenditure 100

6. Corporate Tax 50

7. Net Domestic Fixed Capital Formation 70

8. Net Indirect Tax 60

9. Depreciation 14

10. Change in Stocks (-10)

11. Net Imports 20

12. Net Factor Income to Abroad 10

Q.7 Calculate (i) Gross Domestic Product at Market Price by the Income Method and (ii) National Income by the

Expenditure Method.

Items Rs in Crores

Gross fixed capital formation 260

Consumption of fixed capital 120

Private final consumption expenditure 830

Mixed income 560

Indirect tax 180

Subsidies 20

Interest on national debt 30

Government final consumption expenditure 160

Imports 100

Change in stock 90

Exports 80

Rent, Interest and profit 200

Net factor income to abroad (-)20

Compensation of employees 480

Q.8 If Real Gross Domestic Product is Rs 200 and the Nominal Gross Domestic Product is Rs 210 , calculate the

Price Index (base=100).

Q.9 Distinguish between real and nominal GDP. Which of these is a better indicator of economic welfare?

Q.10 There are only two producing sectors A and B in an economy. Calculate (a) Gross value added at MP by each

sector. (b) National Income.

S.No: Particulars In Crore

1. NFIA 20

2. Sales by A 1000

3. Sales by B 2000

4. Change in stock of B -200

5. Closing Stock of A 50

6. Opening stock 100

7. Consumption of fixed capital by A and B 180

8. Indirect taxes paid by A and B 120

9. Purchase of raw materials, etc by A 500

10. Purchase of raw materials, etc by B 600

11. Exports by B 70

Q.11 Write down some limitations of using GDP as an index of welfare of country.

Q.12 Calculate GNP at MP by (a) Expenditure method and (b) Income method from the following data:

S.NO: Particulars In Crore

1. Government final consumption expenditure 250

2. Change in stocks 65

3. Net Domestic capital formation 150

4. Interest 90

5. Profits 210

6. Corporate Tax 50

7. Rent 100

8. Factor income from abroad 20

9. Indirect taxes 55

10. Factor income to abroad 40

11. Exports 60

12. Subsidies 25

13. Imports 80

14. Consumption of fixed capital 20

15. Private final consumption expenditure 500

16. Compensation of employees 450

17. Value of rent free accommodation to employees 40

Q.13 Calculate Net Value Added at Market Price:

1. Consumption of fixed capital 3,000

2. Price per unit of output 40

3. Intermediate cost 10,000

4. Change in stock 1000

5. Output sold(units) 750

6. Import duty 2000

Q.14 Calculate ‘Gross National Product at Factor Cost’(GNPfc) from the following data by (i)Income Method and

(ii) Expenditure Method.

S.No: Items In crores

1 Private Final Consumption Expenditure 1000

2 Net Domestic Capital Formation 200

3 Profits 400

4 Compensation of Employees 800

5 Rent 250

6 Government Final Consumption Expenditure 500

7 Consumption of Fixed Capital 60

8 Intrest 150

9 Net Current Transfers from Rest of the world (-)80

10 Net Factor Income from Abroad (-)10

11 Net Exports (-)20

12 Net Indirect Taxes 80

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MPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAM CLASS CLASS CLASS CLASS –––– XIIXIIXIIXII H.H.W.H.H.W.H.H.W.H.H.W. MATHEMATICSMATHEMATICSMATHEMATICSMATHEMATICS 1111.... If If If If � �� �� �� + �! "# !� = � % #!# ��, find the , find the , find the , find the -� − "/.... 2222.... If If If If A = A = A = A = 1� # !� ! �! −! #2 , then find the value of , then find the value of , then find the value of , then find the value of 8� − �8 + �9 .... 3333.... If If If If ; � ? @A< ?− ? −� !@A< ? ! � ; = B, Write the value of , Write the value of , Write the value of , Write the value of �.... 4444.... Express the following matrix as a sum of a symmetric and a skew symmetric matricesExpress the following matrix as a sum of a symmetric and a skew symmetric matricesExpress the following matrix as a sum of a symmetric and a skew symmetric matricesExpress the following matrix as a sum of a symmetric and a skew symmetric matrices

1 � −� −�� −� −�−! ! � 2 5555.... For what value of x , the matrix For what value of x , the matrix For what value of x , the matrix For what value of x , the matrix ��� + � �� + � �� is a singular matrix ?is a singular matrix ?is a singular matrix ?is a singular matrix ? 6666.... Using properties of determinants, prove thatUsing properties of determinants, prove thatUsing properties of determinants, prove thatUsing properties of determinants, prove that ;R + S + �T R ST S + T + �R ST R T + R + �S; = �-R + S + T/� ....

7777.... Find the integral values of Find the integral values of Find the integral values of Find the integral values of �, if , if , if , if V� � −!W 1� ! −!! # #� � � 2 V� � −!W′ = #.... 8888.... By using elementary row transformations, find the inverse of the matrixBy using elementary row transformations, find the inverse of the matrixBy using elementary row transformations, find the inverse of the matrixBy using elementary row transformations, find the inverse of the matrix A = A = A = A = 1# ! �! � �� ! !2 9999.... Using properties of determinants, prove the following :Using properties of determinants, prove the following :Using properties of determinants, prove the following :Using properties of determinants, prove the following : ; R S TR − S S − T T − RS + T T + R R + S; = R� + S� + T� − �RST .... 10101010.... Using properties of determinants, prove the following :Using properties of determinants, prove the following :Using properties of determinants, prove the following :Using properties of determinants, prove the following :

]-S + T/� R� R�S� -T + R/� S�T� T� -R + S/�] = �RST-R + S + T/� 11111111.... Solve the following system of equations by matrix method:Solve the following system of equations by matrix method:Solve the following system of equations by matrix method:Solve the following system of equations by matrix method: �� + �" + !#̀ = � ; ; ; ; �� − b" + �̀ = ! ; ; ; ; b� + c" − �#̀ = �.... 12121212.... If A = If A = If A = If A = 1� � !� −! �% � −�2 , then find , then find , then find , then find 8−! . Hence solve . Hence solve . Hence solve . Hence solve the fthe fthe fthe following system of equations by ollowing system of equations by ollowing system of equations by ollowing system of equations by matrix methodmatrix methodmatrix methodmatrix method.... �� + �" + ` = b �� − " + �` = � %� + �" − �` = % 13131313.... Complete all the exercises of NCERT on Matrices and Determinants in separate copy/register.Complete all the exercises of NCERT on Matrices and Determinants in separate copy/register.Complete all the exercises of NCERT on Matrices and Determinants in separate copy/register.Complete all the exercises of NCERT on Matrices and Determinants in separate copy/register. °°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°

MPVM GANGA GURUKULAM

HOLIDAY HOMEWORK

CLASS – XII SESSION 2019–20

PHYSICS :

1. How many types of cell ? Explain briefly with diagram .

2.Write short notes of different accessories:

(a) Resistance box

(b) Rheostat

(c) One way key

(d) Two way key

(e) Plug key

(f) Commutator

3. An early model for an atom considered it to have a positively charged point nucleus of charge Ze,

surrounded by a uniform density of negative charge up to a radius R. The atom as a whole is neutral.

For this model, what is the electric field at a distance r from the nucleus?

4. (a) Explain the meaning of the statement ‘electric charge of a body

is quantised’.

(b) Why can one ignore quantisation of electric charge when dealing

with macroscopic i.e., large scale charges?

5. Two uniformly large parallel thin plates having charge are��and –��densities + kept in the X-Z

plane at a distance ‘d’ apart. Sketch an equipotential surface due to electric field between the plates.

If a particle of mass m and charge‘–q’ remains stationary between the plates, what is the

magnitude andirection of this field?

6. A system has two charges qA = 2.5 × 10–7

C and qB = –2.5 × 10–7

C located at points A: (0, 0, –15 cm)

and B: (0,0, +15 cm), respectively.What are the total charge and electric dipole moment of the

system?

7. Two insulated charged copper spheres A and B if identical size have charges qA and qB respectively. A

third sphere C of the same size but uncharged is brought in contact with the first and then in

contact with the second and finally removed from both. What are the new charges on A and B?

8. State and prove Gauss’s theorem. Apply Gauss’s theorem to calculate electric field due to an Infinite

plane sheet of charge.

9. Careful measurement of the electric field at the surface of a black box indicates that the net outward

flux through the surface of the box is 8.0 × 103 Nm

2/C.

(a) What is the net charge inside the box?

(b) If the net outward flux through the surface of the box were zero, could you conclude that

there were no charges inside the box? Why or Why not?

10. A point charge of 2.0 μC is at the centre of a cubic Gaussian surface 9.0 cm on edge. What is the net

electric flux through the surface?

11. A point charge causes an electric flux of –1.0 × 103 Nm

2/C to pass through a spherical Gaussian

surface of 10.0 cm radius centred on the charge. (a) If the radius of the Gaussian surface were

doubled, how much flux would pass through the surface? (b) What is the value of the point charge?

12. An infinite line charge produces a field of 9 × 104 N/C at a distance of 2 cm. Calculate the linear

charge density.

13. Two large, thin metal plates are parallel and close to each other. On their inner faces, the plates

have surface charge densities of opposite signs and of magnitude 17.0 × 10–22

C/m2. What is E: (a) in

the outer region of the first plate, (b) in the outer region of the second plate, and (c) between the

plates?

14. An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55 × 104 NC

–1

in Millikan’s oil drop experiment. The density of the oil is 1.26 g cm–3

. Estimate the radius of the

drop. (g=9.81 m s–2

; e=1.60 × 10–19

C).

15. In a certain region of space, electric field is along the z-direction throughout. The magnitude of

electric field is, however, not constant but increases uniformly along the positive z-direction, at the

rate of 105 NC

–1 per metre. What are the force and torque experienced by a system having a total

dipole moment equal to 10–7

Cm in the negative z-direction

16. A hollow charged conductor has a tiny hole cut into its surface. Show that the electric field in the

hole is (σ/2ε0) ˆn , where ˆn is the unit vector in the outward normal direction, and σ is the surface

charge density near the hole.

17. Obtain the formula for the electric field due to a long thin wire of uniform linear charge density λ

without using Gauss’s law.

18. Consider an arbitrary electrostatic field configuration. A small test charge is placed at a null point

(i.e., where E = 0) of the configuration. Show that the equilibrium of the test charge is necessarily

unstable.

19. A particle of mass m and charge (–q) enters the region between the two charged plates initially

moving along x-axis with speed vx.The length of plate is L and an uniform electric field E is

maintained between the plates. Show that the vertical deflection of the particle at the far edge of

the plate is

qEL2/(2m vx

2).

20. (a) Calculate the potential at a point P due to a charge of 4 × 10–7

C located 9cm away.

(b)Hence obtain the work done in bringing a charge of 2 × 10–9

C from infinity to the point P.

Does the answer depend on the path along which the charge is brought?

21. Two charges 3 × 10–8

C and –2 × 10–8

C 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.

22. A regular hexagon of side 10 cm has a charge 5 μC at each of its vertices. Calculate the potential at

the centre of the hexagon.

23.A molecule of a substance has a permanent electric dipole moment of magnitude 10–29

C m. A mole

of this substance is polarised (at low temperature) by applying a strong electrostatic field of

magnitude 106 V m

–1. The direction of the field is suddenly changed by an angle of 60º. Estimate

the heat released by the substance in aligning its dipoles along the new direction of the field. For

simplicity, assume 100% polarisation of the sample.

24. A charge of 8 mC is located at the origin. Calculate the work done in taking a small charge of –2 × 10–

9 C from a point P (0, 0, 3 cm) to a point Q (0, 4 cm, 0), via a point R (0, 6 cm, 9 cm).

25.Two charges –q and +q are located at points (0, 0, –a)and(0, 0, a),respectively.

(a) What is the electrostatic potential at the points (0, 0, z) and (x, y, 0) ?

(b) Obtain the dependence of potential on the distance r of a point from the origin when

r/a >> 1.

(c) How much work is done in moving a small test charge from the point(5,0,0) to (–7,0,0) along the

x-axis? Does the answer change if the path of the test charge between the same points is not

along the x-axis?

26. (i) If two similar large plate, each of area A having surface charge densities +σ and –σ are

separated by distance d in air, find the expression for

(a) Field at point between the two plate and on outer side of the plate .Specify the direction of

the field In each case .

(b) The potential difference between the plates.

(ii) Two metallic sphere of radii R and 2R are charged so that both of these have same surface

surface charge density σ .If they are connected to each other with a conducting wire , in which

direction with charge flow and why ?

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MPVM GANGA GURUKULAM

HOLIDAY HOMEWORK 2019-20

SUB: PHYSICAL EDUCATION CLASS 12

Q. 1 What is sports psychology and types of anxieties?

Q.2 What is posture and types of deformities?

Q.3 History of yoga and elements and benefits of yoga.

Q.4 What is balanced diet? Elements of balanced diet?

Q.5 Project on World Cup- Statistics/ Runner- up /Winner/MOTS/ Best Bowler.

MPVM GANGA GURUKULAM

HOLIDAY HOMEWORK 2019-20

SUB: ENGLISH CLASS 12

ANSWER THE FOLLOWING QUESTIONS

Q1.Draft a notice in not more than 50 words informing students of classes 6 to 8 about a poster competition

being organized in your school.You are Arnav/Aarti ,President of Art Club G.T.B.School,Pune.

Q2.Design a poster in not more than 50 words highlighting the importance of reading and the value of books.

Q3.You believe that a positive attitude is needed to ensure happiness ,health and success.As Raju/Rati write an

article in 150-200 words on the topic”Importance of having a positive attitude”

Q4.Write a letter to the editor of the Indian Express about the impact of mobile phones on the lives of children

and youth.

Q5.You are the Principal of Sawan Public School ,New Delhi.You need a PGT Biology for your school.Draft an

advertisement in not more than 50 words to be published in the Hindustan Times.

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MPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAM CLASS CLASS CLASS CLASS –––– XIIXIIXIIXII HOLIDAY HOMEWORKHOLIDAY HOMEWORKHOLIDAY HOMEWORKHOLIDAY HOMEWORK BUSINESS STUDIES 2019BUSINESS STUDIES 2019BUSINESS STUDIES 2019BUSINESS STUDIES 2019 You are supposed to select any one out of 77 products /services and are required to make only one project from the

selected product/services:

1-Adhesives

2-Air conditioners

3-Baby diapers

4-Bathing Soap

5-Bathroom cleaner

6-Bike

7-Blanket

8-BodySpray

9-Bread

10-Breakfast cereal

11-Butter

12-Camera

13-Car

14-Cheese spreads

15-Chocolate

16-Coffee

17-Cosmetology product

18-Crayons

19-Crockery

20-Cutlery

21-Cycle

22-DTH

23-Eraser

24-e-wash

25-Fairness cream

26-Fans

27-Fruit candy

28-Furniture

29-Hair Dye

30-Hair Oil

31-Infant dress

32-Inverter

33-Jams

34-Jeans

35-Jewellery

36-Kurti

37-Ladies bag

38-Ladies footwear

39-Learning Toys

40-Lipstick

41-Microwave oven

42-Mixers

43-Mobile

44-Moisturizer

45-Music player

46-Nail polish

47-Newspaper

48-Noodles

49-Pen

50-Pen drive

51-Pencil

52-Pickles

53-Razor

54-Ready Soups

55-Refrigerator

56-RO system

57-Roasted snacks

58-Salt

59-Sarees

60Sauces/ Ketchup

61-Shampoo

62-Shaving cream

63-Shoe polish

64-Shoes

65-Squashes

66-Suitcase/ airbag

67-Sunglasses

68-Tea

69-Tiffin Wallah

70-Toothpaste

71-Wallet

72-Washing detergent

73-Washing machine

74-Washing powder

75-Water bottle

76-Water storage tank

77-Wipes

You are required to make a project on the identified product/service keeping in mind the following:

1. Why have they selected this product/service?

2. Find out ‘5’ competitive brands that exist in the market.

3. What permission and licences would be required to make the product?

4. What are your competitors Unique Selling Proposition.[U.S.P.]?

5. Does your product have any range give details?

6. What is the name of your product?

7. Enlist its features.

8.Draw the ‘Label’ of your product.

9. Draw a logo for your product.

10. Draft a tag line.

11. What is the selling price of your competitor’s product?

(i) Selling price to consumer

(ii) Selling price to retailer

(iii) Selling price to wholesaler

What is the profit margin in percentage to the

Manufacturer.

Wholesaler.

Retailer.

12. How will your product be packaged?

13. Which channel of distribution are you going to use? Give reasons for selection?

14. Decisions related to warehousing, state reasons.

15. What is going to be your selling price?

(i) To consumer

(ii) To retailer

(iii) To wholesaler

16. List 5 ways of promoting your product.

17. Any schemes for

(i) The wholesaler

(ii) The retailer

(iii) The consumer

18. What is going to be your ‘U.S.P?

19.What means of transport you will use and why?

20. Draft a social message for your label.

21. What cost effective techniques will you follow for your product.

22. What cost effective techniques will you follow for your promotion plan.

At this stage you will realise the importance of the concept of marketing mix and the necessary decision regarding

the four P’s of marketing.

Product

Place

Price

Promotion

On the basis of the work done by you the project report should include the following:

1. Type of product /service identified and the (consumer/industries) process involve there in.

2. Brand name and the product.

3. Range of the product.

4. Identification mark or logo.

5. Tagline.

6. Labeling and packaging.

7. Price of the product and basis of price fixation.

8. Selected channels of distribution and reasons thereof.

9. Decisions related to transportation and warehousing. State reasons.

10. Promotional techniques used and starting reasons for deciding the particular technique.

11. Grading and standardization.

Presentation and Submission of Project Report At the end of the stipulated term, you will prepare and submit your project report.

Following essentials are required to be fulfilled for its preparation and submission.

1.The total length of the project will be of 25 to 30 pages.

2. The project should be handwritten.

3. The project should be presented in a neat folder.

4. The project report should be developed in the following sequence-

Cover page should include the title of the Project, student information, school and year.

List of contents.

Acknowledgements and preface (acknowledging the institution, the places visited and the persons who have

helped).

Introduction.

Topic with suitable heading.

Planning and activities done during the project, if any.

Observations and findings of the visit.

Conclusions (summarized suggestions or findings, future scope of study).

Photographs (if any).

Appendix

Teacher’s observation.

Signatures of the teachers.

MPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAM CLASS CLASS CLASS CLASS –––– XIIXIIXIIXII HOLIDAY HOMEWORKHOLIDAY HOMEWORKHOLIDAY HOMEWORKHOLIDAY HOMEWORK ACCOUNTANCY 2019ACCOUNTANCY 2019ACCOUNTANCY 2019ACCOUNTANCY 2019 1.1.1.1. You are required to You are required to You are required to You are required to complete your project file with one comprehensive problem and two specific complete your project file with one comprehensive problem and two specific complete your project file with one comprehensive problem and two specific complete your project file with one comprehensive problem and two specific problems as discussed in the classproblems as discussed in the classproblems as discussed in the classproblems as discussed in the class 2.2.2.2. Do all the questions given below.Do all the questions given below.Do all the questions given below.Do all the questions given below.

MPVM Ganga Gurukulam

Holiday Homework – 2019

Sub : Informatics Practices

Do the Following programs

1. Program to find the simple interest based upon number of years. If number of years is more than

12 rate of interest is 10 otherwise 15.

2. Write a program to input any choice and to implement the following. Choice Find

1. Area of square

2. Area of rectangle

3. Area of triangle

3. Write a program to input any number and to find reverse of that number.

4. Write a program to print multiplication of a number given by the user.

5. Write a program to find all prime numbers up to given number.

6. Write for statement to print the following series:

a) 10,20,30…….300

b) 105,98,91,….7

7. Write the while loop to print the following series:

a) 5,10,15,…100

b) 100,98,96,…2

8. Write program to input any number and to print all factors of that number.

9. Write a program to input any number and to check whether given number is Armstrong or not.

(Armstrong 1,153 etc. 13 =1 , 13+53 +33 =153)

10. Write a program to input employee no, name basic pay and to find HRA, DA and netpay.

Basic pay Hra Da

>100000 15% 8%

50000 10% 5%

What will the output of the following code.

# What is the use of List?

# How Tuples are useful? Explain with example.

# What do u understand by mutable and immutable types of data?

MPVM Ganga Gurukulam

Holiday Homework – 2019

Sub : Computer Science

Do the Following programs

1. Program to find the simple interest based upon number of years. If number of years is more than

12 rate of interest is 10 otherwise 15.

2. Write a program to input any choice and to implement the following. Choice Find

1. Area of square

2. Area of rectangle

3. Area of triangle

3. Write a program to input any number and to find reverse of that number.

4. Write a program to print multiplication of a number given by the user.

5. Write a program to find all prime numbers up to given number.

6. Write for statement to print the following series:

a) 10,20,30…….300

b) 105,98,91,….7

7. Write the while loop to print the following series:

a) 5,10,15,…100

b) 100,98,96,…2

8. Write program to input any number and to print all factors of that number.

9. Write a program to input any number and to check whether given number is Armstrong or not.

(Armstrong 1,153,etc. 13 =1 , 13+53 +33 =153)

10. Write a program to input employee no, name basic pay and to find HRA, DA and netpay.

Basic pay Hra Da

>100000 15% 8%

50000 10% 5%

What will the output of the following code.

# What is the use of List?

# How Tuples are useful? Explain with example.

# What do u understand by mutable and immutable types of data?

MPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAMMPVM : GANGA GURUKULAM CLASS CLASS CLASS CLASS –––– XIIXIIXIIXII HOLIDAY HOMEWORKHOLIDAY HOMEWORKHOLIDAY HOMEWORKHOLIDAY HOMEWORK BIOLOGY 2019BIOLOGY 2019BIOLOGY 2019BIOLOGY 2019 Q.1 Work out on the topic choosen for project.

Q.2 Collect one soil and one water sample from your area or the place which you are going to visit

during summer vacation.

Q.3 Differentiate with examples :

a. Asexual and sexual reproduction

b. Homothalic and Hetrothalic

c. Parthenocrapy and Parthogenesis

d. Oestrous and Menstrual cycle

e. Chasmogamus and Cleistogamous flowers

Q.4 Explain events with well labeled diagrams:

a. Double fertilization, emryo development (in both dicot and monocot), endosperm development.

b. Oogenesis, spermatogenesis.

Q.5 Draw well labelled diagrams of:

a.T.S Mature anther.

b. T. S Mammalian ovary.

c. Reproductive system of male and female.

d. Development of pollen grain and female gametophyte.

HOLIDAY HOME WORK

CLASS XII

CHEMISTRY

1).19.5 g of fluro acetic acid is dissolved in 500g of water .The depression in freezing point of

water observed is 1.0 oc. Calculate Vant Hoff’s factor and dissociation constant of acid. Kf of water

is 1.86 K kg mol-1

and density of solution is 1.124 g ml-1

.

2).Determine the amount of CaCl2( i =2.47 ) dissolved in 2.5 litre of water such that its osmotic

pressure is 0.75 atm at 270c.

3)0.5 M aqueous solution of NaCl show higher value of osmotic pressure than 0.5 M Glucose

solution at same temperature , why ?

4).What role does the molecular interaction play in solution of alcohol and water ?

5).Why do gases nearly always tend to be less soluble in liquid as the temperature is raised ?

6).Explain + ve and - ve deviation shown by non ideal solution .

7). What are the colligative properties . How these are related with molar mass of solution ?

8). Explain the followings : ----

a) Anoxia .

b) Sea bends .

c) Reverse osmosis .

d) Lowering in V.P.

e) Azeotropes.

HOLIDAY HOME WORK

CLASS XII

HINDI

रचना�मक लेखन एवं ��या�मक काय� 1- ASL (�वण कौशल ) 2- ASL (वाचन कौशल ) 3- समय समय पर किवता एवं कहानी लेखन का आयोजन और उनक� समी�ा�मक क�ाएं । 4-िविभ# सामािजक आ$थक िवषय' पर वाद-िववाद । 5- एकांक� लेखन व *+तुितकरण । .ी/मावकाश - काय� 1- लोकसभा चुनाव - 2019 के उपरांत ग1ठत सरकार के त3य' / आकंड़' एवं िच5' को *+तुत करते 6ए एक समी�ा�मक आलेख िलिखए । 2- ऐन 89 क क� डायरी को पढ़कर उसपर एक फ़�चर िलिखए ।