Holiday Homework

Class XII

SCIENCE

ENGLISH

1.Attempt the following worksheets from the Book, Full Marks Assignments in English plus • Reading section: Assignment page number 27,29 and 31 and page number 73,75 and 77 . • Writing section:

Page 139 question Number 1,2 and 4.

Page 141 question number one, two, four.

Page 145 question number one, four.

147 question number one, two.

Page 149 question number four.

Page 151 question one, two.

Literature section:

Page 195 to 197 diagnostic test 1,2 and 3.

Page 255 diagnostic test one

Page 271 diagnostic test one.

Note: worksheets to be done in the book only

2.Novel:

a. Page 404, learn question number one ,eight and ten.

b. Read the novel further from chapter 5 to 15 and learn back questions given at the

end of each chapter.

Note: worksheets to be done in the book only. Holiday home work should be submitted on Monday, 9 July 2018

PHYSICS

Assignment

1. Derive an expression for the Electric field at a point on the (i) axial line and (ii)

equatorial line of an electric dipole

2. State Gauss’ theorem and apply it to find the electric field at a point due to

(i) A point charge

(ii) A line of charge

(iii) A plane sheet of charge

(iv) A charged spherical conducting shell

3. Derive expression for the potential energy of a system of point charges.

4. Derive expression for the torque on a dipole in a uniform electric field.

5. Derive expression for the work done in turning a dipole in a uniform electric field.

6. Derive an expression for the potential energy of a dipole in a uniform electric field.

7. Explain the principle of a parallel plate capacitor

8. Derive an expression for the capacitance of a parallel plate capacitor.

9. Derive an expression for the effective capacitance when three capacitors are

connected in (i) series (ii) parallel

10. Derive an expression for the energy stored in a parallel plate capacitor.

11. Derive an expression for the loss of energy when two conductors at different

potentials are brought into electrical contact. Account for this energy.

12. Derive and expression for the energy density of a parallel plate capacitor.

13. Derive I = nAeVd

14. Define drift velocity and derive an expression for it.

15. Deduce Ohm’s law from elementary concepts.

16. State Biot Savart’s Law and apply it to find the magnetic field at a point due to

long straight conductor carrying current

17. State Ampere’s circuital theorem and apply it to find the magnetic field inside a

(i) solenoid (ii) toroid

18. State the Principle of a potentiometer and Explain how is it used (i) to determine

the internal resistance of a primary cell (ii) to compare the emfs of two primary cells

29. State Kirchhoff’s laws and apply it to derive Wheatstone’s bridge principle.

20. Explain how will you use a metre bridge to find the resistance of a given resistor

wire?

21. Describe the elements of earth’s magnetic field.

22. Compare the properties of para dia and ferromagnetic substances.

23. Derive an expression for the effective resistance when three resistors are

connected in (i) series (ii) parallel

24. Describe the principle construction and working of CYCLOTRON. Derive an

expression for cyclotron frequency. Why electrons cannot be accelerated in a

cyclotron?

25. Derive an expression for the force between two straight long parallel conductors

carrying constant current and hence define one ampere.

26. Describe the principle construction and working of Moving Coil Galvanometer.

27. Derive an expression for the torque on a current carrying loop kept in a uniform

magnetic field

28. Explain how will you convert a galvanometer into (i) an ammeter (ii) a voltmeter

NOTE : Do the assignment in Physics Register submit on 2nd July 2018

CHEMISTRY

Assignment

Q1.An element with molar mass 2.7 x 10-2 Kgmol-1 forms a cubic unit cell with edge

length 405 pm .If its density is 2.7x103 Kgm-3, what is the nature of the cubic unit

cell?

Q2. The composition of a sample of wustite is Fe 0.93 O 1.00.What fraction of iron

is present in the form of Fe2+ ion?

Q3.Analysis shows that a metal oxide has the empirical formula M 0.96

O1.00.Calculate the percentage of M2+ and M3+ ions in the sample.

Q4.An element A crystallises in fcc structure 200 g of this element has 4.12 x 1024

atoms . If the density of A 7.2 g cm-3, calculate the edge length of the unit cell.

Q5.Aluminium crystallises in a ccp structure . Radius of the atom in the metal is

125pm

(i)what is the length of the side of the unit cell?

(ii)how many unit cells are there in 1 cm3of aluminium?

Q6Calculate the mass of compound ( molar mass = 256 g mol-1) to be dissolved in

75 g of benzene to lower its freezing point by 0.48 K (Kf =5.12K Kg mol-10).

Q7.A solution is prepared by dissolving 10 g non- volatile solute in 200g of water. It

has a vapour pressure of 31.84mm Hg at 308K. Calculate the molar mass of the

solute.

(Vapour pressure of pure water at 308K = 32 mm Hg)

Q8.Calculate the freezing point of the solution when 31 g of ethylene glycol is

dissolved in 500g of water. (Kf for water = 1.86 K Kg mol-10)

Q9. When 1.5 g of a non volatile solute was dissolved in 90 g of benzene , the

boiling point of benzene raised from 353.23 K to 353.93 K . Calculate the molar

mass of the solute .( Kb for benzene = 2.52 Kg mol-1)

Q10.Calculate the boiling point elevation for a solution prepared by adding 10 g of

CaCl2 to 200g of water.

(Kb for water = 0.512 K Kg mol-1, Molar mass of CaCl2 = 111g mol-1)

Q11.A solution of Ni(NO3)2 is electrolysed between platinum electrodes using a

current of 5.0 A for 20 min. What mass of nickel will be deposited at the cathode ? (

atomic mass of Ni = 58.7 g mol-1, 1F ==96500C mol-1)

Q12. Calculate ΔG0 for the reaction :

Mg + Cu2+ Mg2+ + Cu

Given- E0Cell =2.71V, 1F= 96500C mol-1

Q13.The resistance of a conductivity cell containing 10-3 M KCl solution at 25 0C is

1500 Ω.What is the cell constant if conductivity of 10-3M KCl solution at 25 0 C is 1.5

x 10-4 S Cm-1?

Q14.The electrical resistance of a column of 0.05 molL-1 NaOH solution of diameter

1cm and length 50 cm is 5.55 x 103ohm . Calculate its resistivity , conductivity and

molar conductivity.

Q15How many moles of mercury will be produced by electrolysing 1.0M Hg (NO3)2

solution with a current of 2.00 A for 3 hours?

(Hg(NO3)2= 200.6 g mol-1)

Q16. The rate constant for a first order reaction is 60 s-1. How much time will it take

to reduce the initial concentration of the reactant to 1/10 th of its initial value?

Q17.The following data were obtained during the first order thermal decomposition of

SO2Cl2 at a constant volume:

SO2Cl2 SO2 + Cl2

experiment time Total pressure

1 0 0.4

2 100 0.7

Calculate the rate constant.

Q18.A first order reaction takes 10 min. for 25% decomposition . calculate half life for

the reaction.

Q19.A first order reaction takes 30 min. for 50% completion . calculate the time

required for 90% completion of this reaction.

NOTE : Do the assignment in Chemistry Register submit on 2nd July 2018

Q20. Complete the investigatory project file under the headings of aim,

materials required, theory, procedure, observation, result and photos.

BIOLOGY

Assignment

1. Explain asexual mode of reproduction with example.

2. Explain following events with the help of diagram/flowchart...

Megasporogenesis, Microsporogenesis, Monocot/Ficot embryo development,

Fertilization events in human, Spermatogenesis and Oogenesis.

3.Show sectional veiw of the followings..Anther, mammalian ovary, mammalian

testis, blastula

4. Draw neat and labelled diagram of human male and female gamete, plasmid PBR

322, Bioreactr.

5. Define meiocytes, monocious, diocious and hermaphrodite with example

6. Explain autogamy, geitenogamy and allogamy with example

7. Draw a sectional view of human male and female reproductive system.

8. Explain implantation and growth of embryo till three germ layer stage.

9.. Explain ART and its various techniques.

10. Classify contraceptives with example and their mode of working.

11. Explain Mendel's laws with example.

12. Define codominance, pleiotropy and polygenic inheritance with example.

13. What are Mendelian Disorders? Show pattern of inheritance of one sexlinked

and one autosomal disorder.

14. Give characterstics of Turner syndrom and Down syndrom.

15. Explain thalessemia in brief.

NOTE : Do the assignment in Biology Register submit on 2nd July 2018

Prepare a project based on your syllabus.

Prepare your practical record and complete all practical’s in it.

COMPUTER SCIENCE

Complete the Assignment in your register and submit the same on

2nd July 2018

Q1 Differentiate between ( with syntax and example )

a) Logical error and runtime error

b) Global Variable and Local Variable?

(c)Type casting and Type promotion

d) Object Oriented Programming and Procedural Programming

(f) Polymorphism and Default arguments

g) Private and Protected Access Levels

h) Visibility modes (all three)

i) Inline functions and Non member functions.

j)Runtime error and Syntax error. Also give suitable example of each in c++.

Q2 a)What do you understand by Data Encapsulation and Data Hiding?

(i) How are data abstraction and data encapsulation inter-related and Implemented?

1. Define a class SUPPLY in C++ with the following description:

Private members:

Code of type int

FoodName of type string

Sticker of type string

FoodType of type string

A member function GetType() to assign the values for FoodType as per

the given sticker:

Sticker FoodType

GREEN Vegetarian

YELLOW Contains Egg

RED Non-Vegetarian

Public members:

A function FoodIn() to allow user to enter values for Code, FoodName,

Sticker and call function GetType() to assign respective FoodType

A function FoodOut() to allow user to view the content of all the data

members

2. Answer the questions (i) and (ii) after going through the following class code:

class Hospital

Int Pno, Dno;

public:

Hospital(int PN); //Function 1

Hospital(); //Function 2

Hospital(Hospital &H); //Function 3

void In(); //Function 4

void Disp(); //Function 5

` Hospital(); //Function 6

;

void main()

Hospital H(20); //statement 1

i) Which of the functions out of Function 1, 2 ,3 , 4 or 5 will get executed

when the statement 1 is executed in the above code.

ii) Write a statement to declare a new object M with reference to already

existing object H

using Function 3

iii) Which concept of OOPs is illustrated through Function 1 to 3

iv) What is Function 6 known as and does it get invoked?

3. Consider the following C++ code and answer the questions from (i) to (iv):

class University

long City[30];

protected:

University()

void Register();

void Display();

;

class Department: private University

long Dcode[10];

char HOD[20];

protected:

double Budget;

public:

Departement();

void Enter();

void Show();

;

class Student : public Department

long Name[20];

public:

Student();

void Enroll();

void View();

void show();

;

i) Which type of inheritance is shown in above example

ii) Write the names of those member functions which are directly

accessed from the objects of class student

iii) Write the names of those data members which can be directly

accessible from the member functions of class Student

iv) Is it possible to directly call function Display() of class University from

an object of class Department. (Yes/No)?

v) How many bytes will be required by an object of class Student?

vi) Write the names of all the members which are directly accessed by the

object of class department.

vii) Which class constructor will be called when the object of class student

created .

viii) Write the order of Destructor‘s execution.

ix) How many bytes does the object of class department takes in memory.

x) Write statement to call the function show()of class DEPARTMENT

AND STUDENT from the object of Class student

Create your Practical file with following Questions

Write Question as comment on the top of the file(choose any question from back

exercise of your book )

a. Classes and Objects

b. Classes with constructor and Destructor

c. Inheritance

- Single Level

- Multiple Level

- Multilevel Inheritance

d. Any Question of 1-D array(swapping first half elements with Second Half

Elements)

e. Any Question of 2 –D Array ( Showing Upper Triangular elements of the

2D integer array)

Bring the printout of the Code along with output screen shots in a file

Project Work The project has to be developed in C++ language with Object Oriented Technology and

also should have use of Data files. (The project is required to be developed in a group of

2 students)

Create your project according to the above guidelines

Select a latest topic for your project define Classes, Inheritance, and Validation checks while

data entry for your project implement the remaining file handling concepts in the month of

JULY

Topics can be

Loan

Mutual funds

Inventory control

Campaigns record

Pradhan mantri Yojanas

Sports related

Hotel management

Wire management

Election

Any other topic of your choice but it should be latest

PHYSICAL EDUCATION

1. Complete the scrape book on IPL season 11.

2. Complete the Practical File as per the CBSE syllabus.

Assignment 1. Draw a knock out fixture of 11,18,24,27 teams separately.

2. Draw a league fixture by cyclical method for 7,10,12,13 teams.

3. Differentiate between intramural and extramural.

4. Explain any two sports specific programme?

5. What is balanced diet? Explain?

6. Explain eating disorders?

7. Explain the advantages and disadvantages of food supplement for children.

8. Explain the role of asanas for prevention for back pain and obesity.

9. What are the concept of disorder and disability?

10. Explain cognitive disability?

11. Explain the call and nature of disorder?

12. Explain the importance of good posture?

13. Explain the remedial measures for flat foot?

14. Explain the disadvantage of weight training?

15. Explain the difference between kyphosis and lordosis?

16. What is female triad?

17. Explain the Menarch and menstrual dysfunction?

18. Discuss about the women participation in sports in India?

19. Explain the procedure of AAPHER?

20. Explain sit and reach test?

21. Explain Rikli and Jones senior citizen fitness test?

22. Discuss the effect of exercise on circulatory and respiratory system?

23. Explain in brief the physiological changes due to ageing on human body?

24. Explain the effect of exercise on cardio vascular system?

25. Explain the various types of sports injuries?

MATHEMATICS

Assignment

PART - I

PART - II