CLASS XII HOLIDAY HOME WORK FOR SUMMER VACATION Subject – English

1. Paste newspaper clippings of 30 classified columns advertisements and rewrite the same in 50 words each. 2. Write 10 letters to the editor on- Corruption at all levels of society Unhygienic condition in local hospitals Pollution control measures Rash driving Beggary in India Smoking in public places Games and sports at school level Dumping of garbages Politics in educational institutions Misuse of internet 3. Create 10 posters on- World Water Day World Health Day World Environment Day World Food Day World Theatre Day World Walking Day World Population Day Earth Day National AIDS Day Communal Harmony Week

क दरय वदयालय काशीपर

गरीषमावकाश गह कायर 2019-20 का 12

अपठत कावयाश -5

अपठत गदयाश फाइल

परट मीडया परोर 21-40

फचर -1-5

अनचछद 1- 5

परोर लखए-

दन जलद जलद ढलता ह

आतमपरचय

भन

सलवर वडग

HOLIDAY HOMEWORK FOR SUMMER VACATION 2019-20

SUB- PHYSICS CLASS XII A

1. No work is done in moving a test charge over an equipotential surface. Why?

2. Express the unit of electric potential in terms of base units of SI.

3. Name the physical quantity whose SI unit is V/m. State whether it is scalar or vector?

4. Define electric flux. Give its SI unit. State whether it is scalar or vector?

5. A spherical Gaussian surface encloses a charge of 8.85x10—8 C. (i) Calculate the electric flux passing through the surface, and (ii) if the radius of the Gaussian surface is doubled, how would the flux change?

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

7. Explain the behaviour of an electric dipole placed in non-uniform electric field.

8 A parallel plate capacitor is charged by a battery. After some time the battery is disconnected and a dielectric slab with its thickness equal to the plate separation is inserted between the plates. What change will take place in (i) charge on the plates, (ii) electric field intensity between the plates, (iii) the capacitance of the capacitor, (iv) potential difference between the plates, and (v) the energy stored in the capacitor? Justify your answer in each case.

9. A thin metallic spherical shell of radius R carries a charge Q on its surface. A point charge 𝑄

2 is

placed at its center C and another charge 2Q is placed outside the shell at a distance x from the centre. Find (i) the force on the charge at the centre of the shell and at point outside the shell ,(ii) the electric flux through the shell.

10. Two concentric and coplanar spherical shells, of radii a and b (b ˃a) carry charges q and Q respectively. Find the magnitude of the electric field at a point distant x, from their common centre for (i) o ˂ x ˂a (ii)a ≤ x˂ b (iii) b≤ x ˂∞.

11 Two charges of magnitudes -3Q and +2Q are located at points (a, 0) and (4a, 0) respectively. What is the electric flux due to these charges through a sphere of radius 5a with its centre at the origin?

12. Two charges 3x10-8 C and -2x10-8 C are located 15 cm apart. At what point on the line joining the two charges is the electric potential zero?

13. An electric dipole of length 4 cm when placed with its axis making an angle of 600 with a

uniform electric field experiences a torque of 4√3 Nm. Calculate the (i) magnitude of the electric field, (ii) potential energy of the dipole, if the dipole has charge of ± 8 nC .

14. If C1 = 3pF and C2 = 2pF, calculate the equivalent capacitance of the given network between points A & B?

15. Two parallel plate capacitors X and Y connected in series have same area of plates and same separation between them. X has air between the plates while Y contains a dielectric medium of dielectric constant 4. (i) Calculate capacitance of each capacitor if equivalent capacitance of the combination is 4µF. (ii) calculate the potential difference between the plates of X and Y. (iii) what is the electrostatic energy stored in X and Y?

16. The capacitors C1, C2, having plate area A each are connected in series. Compare the capacitance of this combination with the capacitor C3, also having plates of area A each but ʻmade upʼ as shown.

17. You are given an air filled parallel plate capacitor. Two slabs of dielectric constants K1 and K2 having been filled in between the two plates of the capacitor as shown in the Fig. What will be the capacitance of the capacitor if initial area was A and distance between the plates is d?

18. In the circuits shown in the figures, the galvanometer shows no deflection in each case. Find the ratio of R1 and R2

19. Use Kirchoff’s law to find the currents II, I2, and I3 in the circuit given.

20. For the circuit shown below, would the balancing length increases, decreases or remain the same, if (i)R1 is decreased (ii) R2 is increased without any other change in the circuit. (iii)when K2 is open, how does the balanced point change, if current from the driver cell decreases, (iv) when K2 is closed ,how does the balanced point change, if R2 is increased, keeping current from the driver cell constant. Justify your answer.

Holiday Home Work Summer vacation – 2019

CLASS – XII (B) PHYSICS

CHAPTER-I (Electric Charges and Fields)

VERY SHORT ANSWER QUESTIONS (1 MARK)

1. Draw schematically an equipotential surface of a uniform electrostatic field along x-axis.

2. Sketch filed lines due to (i) two equal positive charges near each other (ii) a dipole.

3. Name the physical quantity whose SI unit is volt/meter. Is it a scalar or a vector quantity?

4. Two point charges repel each other with a force F when placed in water of dielectric constant 81. What will the force between them when placed the same distance apart in air?

5. Electric dipole moment of CuSO4 molecule is . Find the separation between copper and sulphate ions.

6. Net capacitance of three identical capacitors connected in parallel is 12 microfarad. What will be the net capacitance when two of them are connected in (i) parallel (ii) series?

7. A charge q is placed at the centre of an imaginary spherical surface. What will be the electric flux due to this charge through any half of the sphere.

8. Draw the electric field vs distance (from the centre) graph for (i) a long charged rod having linear charge density. (ii) spherical shell of radius R and charge .

9. Diagrammatically represent the position of a dipole in (i) stable (ii) unstable equilibrium when placed in a uniform electric field.

10. A charge Q is distributed over a metal sphere of radius R. What is the electric field and electric potential at the centre?

11. If a body contains electrons and protons then what is the total charge on the body?

12. What is the total positive or negative charge present in 1 molecule of water.

13. How does the energy of dipole change when it in rotated from unstable equilibrium to stable equilibrium in a uniform electric field.

14. Write the ratio of electric field intensity due to a dipole at appoint on the equatorial line to the field at a point at a point on the axial line, when the points are at the same distance from the centre of dipole.

15. Draw equipotential surface for a dipole.

16. An uncharged conductor A placed on an insulating stand is brought near a charged insulated conductor B. What happens to the charge and potential of B?

17. A point charge Q is placed at point O shown in Fig. Is the potential difference positive, negative or zero, if Q is (i) positive (ii) negative charge.

18. An electron and proton are released from rest in a uniform electrostatic field. Which of them will have larger acceleration?

19. In an uniform electric field of strength E, a charged particle Q moves point A to point B in the direction of the field and back from B to A. Calculate the ratio of the work done by the electric field in taking the charge particle from A to B and from B to A.

20. If a dipole of charge is placed inside a sphere of radius , what is the net flux linked with the sphere.

21. Four charges are placed as shown in the figure. What is the work done in bringing a test charge from to point 0.

22. If the metallic conductor shown in the figure is continuously charged form which of the points A,B,C or D does the charge leak first. Justify.

23. What is dielectric strength? Write the value of dielectric strength of air.

24. Two charge are located at points . How much work is done in

moving a test charge form point ?

25. If an electron is a accelerated by a Potential difference of 1 Volt. Calculate the gain in energy in Joul and electron Volt.

26. Draw schematically the equipotential surface corresponding to a field that Uniformly increases in magnitude but remains in a constant (say z) direction.

27.What is the work done in rotating a dipole form its unstable equilibrium to Stable equilibrium? Does the energy of the dipole increase or decrease? SHORT ANSWER QUESTIONS 1. Show does the force between two point charges change if the dielectric constant of the medium in which they are kept increase? 2. A charged rod P attracts rod R whereas P repels another charged rod Q. What type of force is developed between Q and R? 3. A free proton and a free electron are placed in a uniform field. Which of the two experience greater force and greater acceleration? 4. No two electric lines of force can intersect each other? Why? 5. A particle of mass m and charge q is released form rest in a uniform electric field of intensity E. calculate the kinetic energy it attains after moving a distance s between the plates? 6. Two point charges +q and +9q are separated by a distance of 10 a. Find the point on the line joining the two changes where electric field is zero? 7. Define the term dipole moment of an electric dipole indicating its direction. Write its S.I unit. An electric dipole is placed in a uniform electric field . Deduce the expression for the Torque acting on it.

8. (1) The electric field due to a point change at any point near to it is defined as: where q is

the test charge and is the force acting on it. What is the significance of in this expression? (2) Two charges each 2 x 10-7 C but opposite in sign forms a system. These charges are located at points A (0,0, -10) cm and B(0,0, +10) cm respectively. What is the total charge and electric dipole moment of the system? 9. (a) Sketch electric lines of force due to (i) isolated positive change (ie q>0) and (ii) isolated negative change ( ie q<0) (b) Two point changes q and –q are placed at a distance 2a apart. Calculate the electric field at a point P situated at a distance r along the perpendicular bisector of the line joining the charges. What is the field when r >> a?

CLASS - XII PHYSICS CHAPTER-II (Electrostatics Potential and Capacitance)

1. Force of attraction between two point electric charges placed at a distance d in a medium is F. What distance apart should these be kept in the same medium, so that force between them becomes F/3? 2. The distance of the field point on the equatorial plane of a small electric dipole is halved. By what factor will the electric filed due to the dipole change? 3. Draw one equipotential surfaces (1) Due to uniform electric field (2) For a point charge (q < o)?

4. If the amount of electric flux entering and leaving a closed surface are and respectively. What is the electric charge inside the surface? 5. Derive an expression for the total work done in rotating an electric dipole through an angle in a uniform electric field? 6. If C1 = 3pF and C2 = 2pF, calculate the equivalent capacitance of the given network between points A & B?

7. Prove that energy stored per unit volume in a capacitor is given by , where E is the electric field of the capacitor? 8. (a) An air filled capacitor is given a charge of 2 C raising its potential to 200 V. If on inserting a dielectric medium, its potential falls to 50 V, what is the dielectric constant of the medium? (b) A conducting stab of thickness‘t’ is introduced without touching between the plates of a parallel plate capacitor separated by a distance d (t<d). Derive an expression for the capacitance of a capacitor?

CLASS - XII PHYSICS CHAPTER-III (Current Electricity)

1. If the temperature of a good conductor decreases, how does the relaxation time of electrons in the conductor change? [1] 2. If potential difference V applied across a conductor is increased to 2V, how will the drift velocity of the electron change? [1] 3. Two electric bulbs A and B are marked 220V, 40 w and 220V, 60 W respectively. Which one has a higher resistance? [2] 4. A Carbon resistor has three strips of red colour and a gold strip. What is the value of resistor? What is its tolerance? [2] 5. Determine the voltage drop across the resistor R1 in the circuit given below with E= 60V, R1=18 , R2=10 R3=5 and R4 = 10 ? [3]

6. What happens to the resistance of the wire when its length is increased to twice its original length? [3] 7. Mark the direction of current in the circuit as per kirchoff’s first rule. What is the value of main current in the shown network? [3]

8. (a) Why do we prefer potentiometer to measure the emf of cell than a voltmeter? [1] (b) With suitable circuit diagram, show how emfs of 2 cells can be compared using a potentiometer? [2]

9. A potentiometer wire AB of length 1m is connected to a driver cell of emf 3V as shown in figure. When a cell of emf 1.5V is used in the secondary circuit, the balance point is found to be 60 cm. On replacing this cell by a cell of unknown emf, the balance point shifts to 80cm.

(i) Calculate unknown emf E’ of the Cell. (ii) Explain with reason, whether the circuit works if the driver cell is replaced with a cell of emf IV. (iii) Does the high resistance R, used in the secondary circuit affect the balance point? Justify your answer.

10. A battery of emf 10V and internal resistance is connected to a resistor. If the current in the circuit is 0.5A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

11. A network of resistances is connected to a 16V battery with internal resistance of as shown.

(i) Compute the Equivalent Resistance of the network. (ii) Obtain the current in each resistor.

(iii) Obtain the voltage drop .

12. The number density of conduction electrons in a Copper Conductor estimated to be . How long does an electron take to drift from one end of a wire 3.0m long to its other end? The area of cross section of the wire is and it is carrying of 3.0 A.

13. A Voltmeter of resistance is used to measure the potential difference across the resistor in the circuit shown in figure. What will be the reading of voltmeter.

14. The Equivalent Resistance between points A and B of the adjoin circuit.

K.V. COSSIPORE

HOLIDAY HOMEWORK

CLASS XII - B

SUB- CHEMISTRY

1. TO SOLVE QUESTIONS FROM THREE YEARS BOARD PAPER i,e (AISSCE –

2017, 2018, 2019).

FROM THE CHAPTERS –

i) SOLUTION

ii) ELECTROCHEMISTRY

iii) CHEMICAL KINETICS

KENDRIYA VIDYALAYA COSSIPORE HOLIDAY HOME WORK

CLASS – XIIA SESSION: 2019-20

Solution

Q. 1. How does the molarity of a solution change with temperature?

Q. 2. Under what condition do non-ideal solutions show negative deviations?

Q. 3. What are minimum boiling azeotrops? Give one example.

Q. 4. What do you understand by the term that kr, for water is 1.86 K kg/mol?

Q. 5. Why is osmotic pressure of 1 M KCl higher than 1 M urea solutions?

Q. 6. State Henry’s Law. What is the significance of KH?

Q. 7. How is that measurement of osmotic pressure is more widely used for determining molar masses of macromolecules than the elevation in boiling point or depression freezing point of their solutions?

Q.8. The partial pressure of ethane over a saturated solution containing 6.56 x 10-2 g of ethane is 1 bar. If the solution contains 5.00 x 10-2 g of ethane, then what shall be the partial pressure of the gas? Q.9. Non-ideal solution exhibit either positive or negative deviations from Raoult’s law. What are these deviation and why are they caused? Explain with one example for each type. Q.10. A solution of glycerol (C3H8O3) in water was prepared by dissolving some glycerol in 500 g of water. This solution has a boiling point of 100.42C while pure water boils at 100 ᵒC. What mass of glycerol was dissolved to make the solution? (Kb of water = 0.512 K kg/mol) Q. 11. 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 27 ᵒC Q. 12. The molar freezing point depression constant for benzene is 4.90K kgmol-1. Selenium exists as polymer Sex. When 3.26 gm of Se is dissolved in 226 gm of benzene, the observed freezing point is 0.112 ᵒC lower than for pure benzene. Decide the molecular formula of Selenium. (At wt of selenium is 78.8 g mol-1) Q. 13. a) State Raoult’s Law for a solution containing volatile components. How does Raoult’s law become a special case of Henry’s Law? b) 1.00 g of a non-electrolyte solute dissolved in 50 g of benzene lowered the freezing point of a benezene by 0.40 K. Find the molar mass of the solute. (Kr for beneze = 5.12 K kg mol-1) Q. 14. a) Calculate the molarity of a sulphuric acid solution in which the mole fraction of water is 0.85 b) The graphical representation of vapour pressure of two component system as a function of composition is given alongside. i) Are the A – B interaction weaker, stronger or of the same magnitude as A – A and B – B ii) Name the type of deviation shown by this system from Raoult’s law iii) Predict the sign of ∆mixH for this system iv) Predict the sign of ∆mixV for this system v) Give an example of such a system. vi) What type of Azeotrope will this system form, if possible?

Electrochemistry

Q. 15. Give the relationship between molar conductivity and specific conductivity? Q. 16. What is meant by limiting molar conductivity? Q. 17. What is the unit of molar conductivity? Q. 18. What is the effect of dilution or concentration of specific conductance? Q. 19. What is fuel cell. Write two chemicals which can be used as fuel. Q. 20. What type of battery is the lead storage battery? Write the anode and the cathode reaction and the overall reaction occurring when current is drawn from it?

Q. 21. How many moles of mercury will be produced by electrolyzing 1.0 M Hg (NO3)2 Q. 22. Represent the galvanic cell in which the following reactions take place Zn (S) + 2Ag+ (aq) --> Zn2+ (aq) + 2 Ag (s)

i) Which one of its electrode is negative charged ii) The reaction taking place at each of its electrode iii) The carrier of current with this cell.

Q. 23. State faraday’s law. How much change is required for the reduction of 1 mole of Cu2+ to Cu? Q. 24. Determine the value of equilibrium constant and ∆ Gᵒ for the following reaction Ni (s) + 2Ag+ (aq) ---> Ni2+ (aq) + 2 Ag (S) (Eᵒ = 1.05 V) Q. 25. Calculate the standard electrode potential of Ni 2+ // Ni electrode if emf of the Ni2+/Ni (0.01)//Cu 2+ (0.1)/Cu (s) is 0.059V. Given Eᵒcell = 0.34 V Q. 26. The resistance conductivity cell filled with 0.1 M KCl solution is 100 ohm. If the resistance of the same cell when filled with 0.02 M KCl solution is 520 ohm, calculate the conductivity and molar conductivity of 0.02 M KCl solution. Conductivity of 0.1 M KCl solution is 1.29 m-1 Q. 27. Give an example of a fuel cell and write the cathode and anode reaction for it. Q. 28. i) Define the molar conductivity of a solution and explain how molar conductivity changes with change in concentration of solution for a weak and strong electrolyte ii) The resistance of a conductivity cell containing 0.001M KCl solution at 298 K is 1500 Ω. What is the cell constant if the conductivity of 0.01M KCl solution at 298 K is 0.146 (10-3) S cm-1 Q. 29. i) Write the formulation for galavanic cell in which the reaction Cu (s) + 2 Ag+ (aq) ---> Cu 2+ (aq) + 2 Ag (s) Takes place, identify the cathode and the anode reaction in it ii) Write Nernst equation calculate the emf of the following cell Sn (s) / Sn2+ (0.04 M) // H+ (0.02 M) /H2 (g) Pt (s) (given Eᵒ Sn2+ / Sn = -0.14 V)

Chemical Kinetics

Q. 30. Define the term: activation energy Q. 31. Give an example of Pseudo first order reaction Q. 32. The rate constant of a reaction is 0.005 molL-1 s-1. What is the order of this reaction? Q. 33. Define collision frequency. Q. 34. Define the terms: - i) Threshold energy ii) Elementary reaction Q. 35. Show that in a first order reaction, time required for completion of 99.9% is 10 times of half-life (t ½ ) of the reaction.

K. V. Cossipore

Holiday Home Work (Summer Vacation 2019-20)

Class – XII

Mathematics

Q1. If F: R→ R be defined by f(x) = 𝑥√1+𝑥2

, then find fofof(x).

Q2. Let F: [-1,∝) →[-1,∝) is given by f(x)=(x+1)2-1. Show that F is invertible. Also, find the set S=x: f(x) = f-1(x).

Q3. Consider F: R→(-9,∝) given by f(x)=5x2+6x-9. Prove that f is invertible with f-1(y) = 54+5𝑦−3

5.

Q4. Prove that: 2tan-1(tan𝛼2 tan𝛽

2) = cos-1( cosα+cosβ

1+cos𝛼 𝑐𝑜𝑠𝛽).

Q5. Which is greater tan (1) or tan-1(1)?

Q6. Solve for x: 2tan-1(cos x) = tan-1(2cosec x).

Q7. Prove that: tan-1 [√1+𝑥−√1−𝑥√1+𝑥+√1−𝑥

] = 𝜋4 - 12cos-1x, - 1

√2≤ x ≤ 1.

Q8. Prove that the relation R in the set A= 5,6,7,8,9 given by R= (a, b): |a-b| is divisible by 2 an equivalence relation. Find all elements related to the element 6.

Q9. A =2 −3 53 2 −41 1 −2

, Find A-1 using elementary operation.

Q10. If A =

⎣⎢⎢⎢⎡ −1 3

2

−12

12⎦⎥⎥⎥⎤, then find the value of I + A+ A2 + A3+ . . . ∝.

Q.1 If return statement is not used inside the function, then what value will be returned by

a function.

Q.2 What is the output of the following code?

def myfun(*name):

print('Hello', name)

myfun('my', 'school')

Q.3 What is the output of the following code?

numbers = [4, 5, 6]

newNumbers = tuple(map(lambda x: x , numbers))

print(newNumbers)

Q.4 Define a function which will find all such numbers which are divisible by 7 but are not a

multiple of 5,between 1000 and 3000 (both included)

Q.5 Define the same function of question no 4 where starting and ending number is passed

as argument

Q.6 Define a function that accepts a sentence and calculate the number of letters and digits

Q.7 Define a function that accepts a sentence and calculate the number of upper case

letters and lower case letters

Q.8 Define a function that can accept two strings as input and concatenate them and then

print it in console.

Q.9 Define a function which can generate and print a list where the values are square of

numbers between 1 and 20 (both included).

Q.10 With a given tuple (1,2,3,4,5,6,7,8,9,10), define a function to print the first half values

in one line and the last half values in one line.

Q.11 What is the output of the below program?

def myfunc(a, b=5, c=10):

print('a is', a, 'and b is', b, 'and c is', c)

myfunc(3, 7)

myfunc(25, c = 24)

myfunc(c = 50, a = 100)

CLASS XII, COMPUTER SC HOLIDAY HOMEWORK 2019-20

Q.12 What is the output of the below program?

x = 150

def myfunc():

global x

print('x is', x)

x = 2

print('Changed global x to', x)

myfunc()

print('Value of x is', x)

Q.13 What is the difference between a parameter and an argument?

Q.14 Why is using the global statement a bad practice?

Q.15 How can we make a parameter of a function optional?

Q.16 What is the difference between local and global variables?

Q.17 Write a function called my_buzz that takes a number.

If the number is divisible by 3, it should return “Fizz”.

If it is divisible by 5, it should return “Buzz”.

If it is divisible by both 3 and 5, it should return “FizzBuzz”.Otherwise, same no.

Q.18 Write a function that returns the sum of multiples of 3 and 5 between 0 and limit

(parameter)

Q.19 Write a function that prints all the prime numbers between 0 and limit where limit is a

parameter.

Q.20 What Is The Output Of The Following Code Snippet?

x = 50

def func():

global x

print('x is', x)

x = 2

print('Changed global x to', x)

func()

print('Value of x is', x)

Q. 22 What Is The Output Of The Following Code Snippet?

num = 1

def func():

global num

num = num + 3

print(num)

func()

print(num)

Q.23 What Is The Value Of Num After The Function Call?

def myfunc(text, num):

while num > 0:

num = num - 1

num=4

myfunc('Hello', num)

Q.24 What Is The Output Of The Following Code Snippet?

def testvarargs(farg, *args):

print ("formal arg:", farg)

for arg in args:

print ("another arg:", arg)

testvarargs(1, "two", 3)

Q.25 What Is The Name Given To That Area Of Memory, Where The System Stores The

Parameters And Local Variables Of A Function Call?

Q.26 What Is The Output Of The Following Code Snippet?

exp = lambda x: x ** 3

print(exp(3))

ADVANCE OPERATIONS ON DATAFRAMES Q.1 Create a dataframe with following values

Indicator Country Year Value

1 India 2005 6

2 India 2005 13

3 India 2005 10

4 India 2005 11

5 India 2005 5

1 India 2006 3

2 India 2006 2

3 India 2006 7

4 India 2006 3

5 India 2006 6

Now display the data in following manner

Country Year 1 2 3 4 5

India 2005 6 13 10 11 5

India 2006 3 2 7 3 6

Q.2 Create a dataframe with following values

Name Position City Age Sex

0 Maya Manager Mumbai 35 Female

1 Joy Manager Kolkata 37 Male

2 Lata Manager Lucknow 40 Female

3 Vibha Programmer Kolkata 29 Female

4 Sarita Programmer Mumbai 31 Female

5 Maya Manager Mumbai 26 Female

6 Lata Manager Kolkata 28 Female

a)Now display data in following pattern(Average of age is displayed)

City Kolkata Lucknow Mumbai

Position

Manager 32.5 40.0 30.5

Programmer 29.0 NaN 31.0

CLASS XII, SUB- I.P. , HOLIDAY HOMEWORK 2019-20

b)Now display data in following pattern(sum of age is displayed)

City Kolkata Lucknow Mumbai

Position

Manager 65.0 40.0 61.0

Programmer 29.0 NaN 31.0

c)Now display data in following pattern(First occurrence name is displayed)

City Kolkata Lucknow Mumbai

Position

Manager Joy Lata Maya

Programmer Vibha NaN Sarita

d)Now display data in following pattern

Position Kolkata Lucknow Mumbai

0 Manager Joy, Lata Lata Maya, Maya

1 Programmer Vibha - Sarita

Ans.

print (df.pivot_table(index='Position', columns='City', values='Name', aggfunc=',

'.join, fill_value='-')

.reset_index()

.rename_axis(None, axis=1))

Q.3 Create a dataframe with following values

Brand Price Year

0 Samsung J7 22000 2015

1 Vivo V11 25000 2013

2 Honor play 27000 2018

3 Xiomi mi8 35000 2018

a) Sort the data on Brand name

b) Sort the data on Brand name in descending order

c) Sort the data on first year basis then price in ascending order

Q.4 What will be output after following program execution?

import pandas as pd

table =

"Name": ["anil", "vishal","manish","mohak"],

"Age": [12,34,22,14],

df = pd.DataFrame(table)

print(df)

print (df.pivot_table(index="Name",columns="Name",values="Age"))

Q. 5 Create the following dataframe

Name Exam Subject Score

0 Abhay Semester 1 Mathematics 62

1 Bhargav Semester 1 Mathematics 47

2 Chitresh Semester 1 Mathematics 55

3 Abhay Semester 1 Science 74

4 Bhargav Semester 1 Science 31

5 Chitresh Semester 1 Science 77

6 Abhay Semester 2 Mathematics 85

7 Bhargav Semester 2 Mathematics 63

8 Chitresh Semester 2 Mathematics 42

9 Abhay Semester 2 Science 67

10 Bhargav Semester 2 Science 89

11 Chitresh Semester 2 Science 81

Now display data in following manner using pivot_table() function

Score

Exam Subject

Semester 1 Mathematics 164

Science 182

Semester 2 Mathematics 190

Science 237

Score is result of sum of scores of that category(like semester 1 Mathematics total

score)

KENDRIYA VIDYALAYA COSSIPORE CLASS XII

HOLIDAY HOME WORK FOR SUMMER VACATION

ANSWER THE FOLLOWING QUESTIONS

1) WHICH OF THE ARCHITECTURAL FEATURES OF MOHENJODARO INDICATE PLANNING?

2) WHY DO YOU THINK KINGS CLAIMED DIVINE STATUS?

3) WHY DO YOU THINK THE BRAHMANAS QUOTED THE PURUSHA SUKTA HYMN FREQUENTLY?

4) COMPARE THE WAYS IN WHICH MEN AND WOMEN ACQUIRE PROPERTY. PROJECT ON PAIRED STATES.

Summer Vacation Holiday Home-work Class -XII

Political science

1) MAP POINTING - On a map of India :

A) Mark the original states from which the following states were carved out- i) Gujarat, ii) Meghalaya, iii) Haryana, d) Chattisgarh

B) Mark the four princely states which faced a problem in the integration into the Indian Union. C) The state where the first non-Congress government was formed by E.M.S. Namboodiripad. D) Any Two states where CPI had major support. E) Any two states where Bharatiya Jana Sangh had major support. 2) Answer the following questions:

a) How has the method of voting changed from the first General Election of 1952 to the General election of 2004 ?

b) Explain how the General Elections of 1952 in India were a landmark in the history of democracy all over the world.

c) What is meant by opposition in a democratic system ? Describe the activities of the opposition during the first two Parliament of 1952 and 1957.

d) “The drop of bombs on Hiroshima and Nagasaki by the US was a political game.” Justify the statement.

e) Why did Gorbachev’s reform policies fail inspite of his accurate diagnosis of the problem?

3) Social Science Group project ( 5 students in a group)- On any one topic

a) Role of women in social development of the paired state. OR

b) Religious places of importance in the paired state and country. OR c) Cultural diversity of the paired state and country.

Scanned by CamScanner

SUMMER HOLIDAY HOME WORK 2019-20CLASS - XII, SUBJECT - ECONOMICS

Scanned by CamScanner

Scanned by CamScanner

Scanned by CamScanner

Page 1 of 6

HOLIDAY HOMEWORK CLASS XII COMMERCE ACCOUNTANCY

LAST 5 YEARS BOARD QUESTION ON FUNDAMENTALS OF PARTNERSHIP

2017

Q1. Distinguish between fixed capital account and fluctuating capital account on the

basis of credit balance.

1marks

Q2.P and Q were partners in a firm sharing profits and losses equally their fixed capitals

were Rs 2, 00,000 and Rs 3, 00,000 resp. the partnership provided for interest @ 12

p.a for the year ended 31st March 2016 the profits were distributed without providing

interest on capital. Pass necessary adjustment entry to rectify the error.

1marks

2016

Q1.Tom and Harry were partners in a firm sharing profits in the ratio of 5: 3. During the

year ended 31.3.2015 Tom had withdrawn Rs40,000. Interest on his drawings

amounted to Rs2,000. Pass necessary journal entry for charging interest on drawings

assuming that the capitals of the partners were fluctuating.

1 marks

Q2.A group of 40 people wants to form a partnership firm. They want your advice

regarding the maximum number of persons that can be there in a partnership firm and

the name of the Act under whose provisions it is given.

1 marks

Q3.State any three circumstances other than (i) death of a partner, (ii) admission of a

partner and (iii) retirement of a partner when need for valuation of goodwill of a firm

may arise.

3 marks

Q4.Vikas, Vivek were partners in a firm sharing profits in the ratio of 3: 2. On 14.2014

they admitted Vandana as a new partner for 1/8th share in the profits with a

guaranteed profit of Rs1,50,000. The new profit sharing ratio between Vivek and Vikas

will remain the same but they decided to bear any deficiency on account of guarantee

to Vandana in the ratio 2: 3. The profit of the firm for the year ended 31.3.2015 was

Page 2 of 6

Rs9,00,000. Prepare Profit and Loss Appropriation Account of Vikas, Vivek and Vandana

for the year ended 31.3.2015. 4 marks

2015

Q1. In the absence of Partnership Deed, interest on loan of a partner is allowed: (i) at

8% per annum. (ii) at 6% per annum. (iii) no interest is allowed. (iv) at 12% per

annum . 1 mark

Q2.On 1.4.2013, Brij and Nandan entered into partnership to construct toilets in

government girl’s schools in the remote areas of Uttarakhand. They contributed capitals

of Rs10,00,000 and Rs15,00,000 respectively. Their profit sharing ratio was 2 : 3 and

interest allowed on capital as provided in the Partnership Deed was 12% per annum.

During the year ended 31.3.2014, the firm earned a profit of Rs2,00,000. Prepare Profit

and Loss Appropriation Account of Brii and Nandan for the year ended 31.3.2014.

3 marks

Q3. Prem, Param and Priya were partners in a firm. Their fixed capitals were Prem

Rs2,00,000; Param Rs3,00,000 and Priya Rs5,00,000. They were sharing profits in the

ratio of their capitals. The firm was engaged in the sale of ready-to-eat food packet at

three different locations in the city, each being managed by Prem, Param and Priya.

The outlet managed by Prem was doing more business than the outlets managed by

Param and Priya. Prem requested Param and Priya for a higher share in the profits of

the firm which Param and Priya accepted. It was decided that the new profit sharing

ratio will be 2 : 1 : 2 and its effect will be introduced retrospectively for the last four

years. The profits of the last four years were Rs2,00,000; Rs3,50,000; Rs4,75,000 and

Rs5,20,000 respectively. Showing your calculations clearly, pass a necessary adjustment

entry to give effect to the new agreement between Prem, Param and Priya.

4 marks.

2014

Q1.Give the meaning of 'Reconstitution of a partnership firm. 1

mark

Q2.Singh and Gupta decided to start a partnership firm to manufacture low cost jute

bags as plastic bags were creating many environmental problems. They constituted

capitals of Rs1,00,000 and Rs50,000 on 1st April, 2012 for this. Singh expressed his

willingness to admit Shakti as a partner without capital, who is specially abled but a

Page 3 of 6

very creative and intelligent friend of his. Gupta agreed to this. The terms of

partnership were as follows: (i) Singh, Gupta and Shakti will share profits in the ratio of

2 :2: 1. (ii) Interest on capital will be provided @ 60% p.a. Due to shortage of capital,

Singh contributed Rs 25,000 on 30th September, 2012 and Gupta contributed Rs10,000

on 1st January, 2013 as additional capital. The profit of the firm for the year ended 31st

March, 2013 was Rs1,58,900. (a) Identify any two values which the firm wants to

communicate to the society. (b) Prepare Profit &Loss Appropriation Account for the year

ending 31st March,2013. 4 Marks

Q3. Seema, Thnuja and Tripti were partners in a firm trading garments. They were

sharing profits in the ratio of 5: 3 : 2.Their capitals on 1 st April, 2012 were Rs3,00,000;

Rs 4,00,000 and Rs8,00,000 respectively. After the flood in Uttarakhand, ail partners

decided to help tire flood victims personally. For this Seema withdrew Rs 20,000 from

the firm on 15th September, 2012. Tanuja instead of withdrawing cash, from the firm

took garments amounting to Rs24,000 from the firm and distributed those to the flood

victims. On the other hand, Tripti withdrew Rs2,00,000 from her capital on 1 st January

2013 and provided a mobile medical van in the flood affected area.

The partnership deed provides for charging interest on drawing s @ 6% p.a. After the

final accounts were prepared it was discovered that interest on drawings had not been

charged. Give the necessary adjusting journal entry and show the working notes

clearly. Also state any two values which the partners wanted to communicate to the

society. 6 marks

2013

Q1.If the Partners' Capitals are fixed, where will you record the interest charged on

drawings?

1 marks

Q2. Mohan, Neeraj and Peeyush are partners in a firm. They contributed Rs75,000 each

ascapital three years ago. At that time Peeyush agreed to look after the business as

Mohan and Neeraj were busy. The profits for the past three years were Rs45,000,

Rs30,000 and respectively. Rs60,000 While going through the books of accounts,

Mohan noticed that profit had been distributed in 1: 1: 2 ratio. When he enquired from

Peeyush about this, peeyusi answered that since he looked after the business he should

get more profit. Mohan disagreed and it was decided to distributed profits equally with

retrospective effect for the last three years. (a) You are required to make necessary

corrections in the books of accounts of Mohan, Neeraj and Peeyush bypassing an

Page 4 of 6

adjustment entry. (b) Identify the value which is being ignored by peeyush.

3 marks

Q3. Ahmad, Bheem and Daniel are partners in a firm. on 1st April 201l the balance in

their capital accounts stood at Rs 8,00,000, Rs6,00,000 and Rs4,00,000 respectively.

They shared profits in the proportion of 5: 3:2 respectively. Partners are entitled to

interest on capital @5% per annum and salary to Bheem @ Rs3,000 per month and a

commission of Rs12,000 to Daniel as per the provisions of the partnership deed.

Ahmad's share of profit, excluding interest on capital, is guaranteed at not less than

Rs25,000 p.a. Bheem's share of profit, including interest on. Capital but excluding

salary, is guaranteed at not less than Rs55,000 p.a. Any deficiency arising on that

account shall be met by Daniel. The profits of the firm for the year-ended 31st March

2012 amounted to Rs2,16,000. Prepare profit and Loss Appropriation Account' for the

year ended 31st March 2012. 6 marks

FOR PRACTICE

1) A and B are partners sharing profits in the ratio of 3: 2 with capitals of Rs. 5,

00,000 and Rs. 3, 00,000 respectively. Interest on capital is agreed @ 6%

p.a. B is to be allowed an annual salary of Rs. 25000. During 2006, the

profits of the year prior to calculation of interest on capital but after charging

B's salary amounted to Rs. 1,25,000. A provision of 5% of the profits is to

be made in respect of Manager's commission.

Prepare an account showing the allocation of profits and partners' capital

accounts.

2) X and Y are partners sharing profits and losses in the ratio of 3: 2 with capitals

of Rs. 50,000 and Rs. 30,000 respectively. Each partner is entitled to 6%

interest on his capital. X is entitled to a salary of Rs. 800 per month together

with a commission of 10% of net 'Profit remaining after deducting interest on

capitals and salary but before charging any commission. Y is entitled to a

salary of Rs. 600 per month together I. with-a commission of 10% of Net

profit remaining after deducting interest on capitals and salary and after

charging all commissions. The profits for the year prior to calculation of

Page 5 of 6

interest on capital but after charging salary of partners amounted to Rs.

40,000. Prepare partners' Capital Accounts:-

(i) When capitals are fixed, and

(ii) When capitals are. Fluctuating.

3 . P and Q are partners sharing profits and losses in the ratio of 3:2. On 1st April

2009 their capital balances were Rs.50, 000 and 40,000 respectively. On 1st July

2009 P brought Rs.10, 000 as his additional capital whereas Q brought Rs.20,

000 as additional capital on 1st October 2009. Interest on capital was provided @

5% p.a. Calculate the interest on capital of P and Q on 31st March 2010.

4. A and B are partners sharing profits and losses in the ratio of 2:1. A

withdraws Rs.1500 at the beginning of each month and B withdrew Rs. 2000 at

the end of each month for 12 months. Interest on drawings was charged @ 6%

p.a. Calculate the interest on drawings of A and B for the year ended 31st

December 2009.

5.A, B and C entered into partnership on 1st April, 2008 to share profits & losses in the ratio of 4:3:3. A, however, personally guaranteed that C's share of profit after charging interest on Capital @ 5% p.a. would not be less than Rs. 40,000 in any year. The Capital contributions were: A, Rs. 3, 00,000; B, Rs. 2, 00,000 and C, Rs. 1, 50,000. The profit for the year ended on 31st March, '2008 amounted to Rs. 1, 60,000. Show the Profit & Loss Appropriation Account. . 6. A, and C are partners with fixed capitals of Rs. 2,00,000, Rs. 1,50,000 and Rs. 1,00,000 respectively. The balance of current accounts on 1st January, 2004 were A Rs. 10,000 (Cr.); B Rs. 4,000 (Cr.) and C Rs. 3,000 (Dr.). A gave a loan to the firm of Rs. 25,000 on 1st July, 2004. The Partnership deed provided for the following:- (i) Interest on Capital at 6%. (ii) Interest on drawings at 9%. Each partner drew Rs. 12,000 on 1st July, 2004. (iii) Rs. 25,000 is to be transferred in a Reserve Account. (iv) Profit sharing ratio is 5:3: 2 up to Rs. 80,000 and above Rs. 80,000 equally. Net Profit of the firm before above adjustments was Rs. 1,98,360. From the above information prepare Profit and Loss Appropriation Account, Capital and Current Accounts of the partners.

7. X, Y, and Z are partners sharing profits in the ratio of 5: 4: 1. Z is given a

guarantee that his share of profit in any year would be not less than Rs. 10000.

Page 6 of 6

Deficiency if any would be borne by X and Y equally. The profits for the year

2008 amounted to Rs. 80000. Pass necessary entries in the books of the firm.

46. Sunny and Pinky started partnership on 01-04-2009 with capital of Rs. 125000

and Rs. 75000, respectively. On 01-10-2009, they decided that their capitals should

be Rs. 100000 each. The necessary adjustments in the capitals are made by

introducing or withdrawing cash. Interest on capital is to be allowed @ 10 % p.a.

Calculate interest on capital as on 31-03-2010.

8 A, B and C arte partners. They admit D and guarantee that his share of profit will

not be less than Rs. 20,000. Profits to be shared 4:3:3:2 respectively. Total profits

were Rs. 96,000. It was agreed that excess payable to D over his share will be

borne by A,B and C in the ratio of 3:2:1. Calculate share of profit for each partner.

HOLIDAY HOMEWORK CLASS XII COMMERCE BUSINESS STUDIES NATURE AND SIGNIFICANCE OF MANAGEMENT 1)Yash Ltd. is facing a lot of problems these days. It manufactures electronic goods like washing machines, microwave ovens, refrigeration and airconditioners. The company‟s margins are under pressure and the profits and market marketing department blames production department for producing goods, which are not of good quality to meet customers‟ expectations. The finance department blames both production and marketing departments for declining return on investment and bad marketing. 1. What quality of management do you think the company is lacking? Justify your answer. 2. State the importance of the concept identified in (a). 2)Aman, Ahmad and Ally are partners in a firm engaged in the distribution of dairy products in Maharashtra state. Aman is a holder of Senior Secondary School Certificate from Central Board of Secondary Education with Business Studies as one of his elective subjects. Ahmad had done his post graduation in History and Ally in dairy farming. One day there was a serious discussion between Ahmad and Ally regarding the nature of management. Ahmad argued that management was a profession whereas Ally argued against it saying that the legal and medical professions are the only professions because they fulfill all the conditions of profession. Aman on the basis of his knowledge of business studies explained the nature of management as a profession to Ahmad and Ally. Explain, how Aman would have satisfied both Ahmad and Ally. 3)B Ltd. wants to modify its existing product, CD players in the market due to decreasing sales. What functions should each level of management perform to give effort to this decision? Sonali is the manager of a large company manufacturing garments for kids. She plans her winter collection in the month of August itself. Then, she ensures that there is adequate workforce. She continuously monitors whether production is proceeding according to plans. She asks the marketing department to prepare their promotional and advertising campaigns also. a. Identify and explain the concept of management explained in the above paragraph b. What characteristic/ feature does the above para highlight? 4)Hi Tech Ltd. is a company producing IT services. The company‟s profits are enough for the survival and growth. The management of the company believes that a satisfied employee creates a satisfied customer, who in turn creates profits that lead to satisfied shareholders. So, it pays competitive salaries and perks to its all employees. All the employees are happy working in the organization because of personal growth and development.

The company has a strong sense of social responsibility. It has set up an engineering college in which one-third of the students are girls to whom the company gives 50% scholarship. Is the management of H. Tech Ltd. fulfilling its objectives? Justify your answer by giving reasons 5)Govinda Ltd. is a highly reputed company. Different functions are performed by different individuals in this company, who are bound together in a hierarchy of relationships. Every individual in the hierarchy is responsible for successful completion of a particular task. Mr. Gauranga is responsible for the welfare and survival of the organization. He formulates overall organizational goals and strategies for their achievement. MR. Nityanand ensures that quality of output is maintained, wastage of materials is minimized and safety standards are maintained. Mr. Sanatan assigns necessary duties and responsibilities to the personnel and motivates them to achieve desired objectives At what levels of management are Mr. Gauranga, Mr. Nityanand and Mr. Sanatan working in Govinda Ltd.? justify your answer. 6)Mega Ltd. manufactured water-heaters. In the first year of its operations, the revenue earned by the company was just sufficient to meet its cost. To increase the revenue, the company analysed the reasons behind the less revenues. After analysis, the company decided: • To reduce the labour cost by shifting the manufacturing unit to a backward area where labour was available at a very low rate. • To start manufacturing solar water-heaters and reduce the production of electric water-heaters slowly. This will not only help in covering the risks but also help in meting other objectives.

1. Identify and explain the objectives of management discussed above. PRINCIPLES OF MANAGEMENT

1)Soniya Ltd. was engaged in the business of manufacturing Auto components. Lately, its business was expanding due to increased demand for cars. The competition was also increasing. In order to keep its market share intact, the company directed its workforce to work overtime. But this resulted in many problems. Due to increased pressure of work the efficiency of workers declined. Sometimes, the subordinates had to work for more than one superior. The workers were becoming undisciplined. The spirit of teamwork, which had characterized the company previously, had begun to wane. Identify any three principles of management (as given by Henry Fayol which were begin violated, quoting the lines from the above

case.

2)Neeraj is selected for the post of software developer in an IT Company. On the first day of his joining Mehul, his project manager tells Neeraj that during the

course of his work he will come across many such opportunities which may temp him to misuse his powers for individual or family‟s benefit at the cost of larger general interest of the company. In such situations, he should rather exhibit exemplary behaviour as it will raise his stature in the eyes of the company. Also, for interacting with anyone in the company on official matters, he should adopt the formal chain of authority and communication. In context of the above case: 1. Identify and explain the various principles of management that Mehul is advising Neeraj to follow while doing his job. 3)Davinder is a class twelfth commerce student in a reputed school in Punjab. Satinder is his elder brother who is doing his Masters in Hospital administration from Delhi after completing his B. Sc course. During vacations when Satinder comes home, Davinder shows him the business studies project that he is preparing on the topic „Principles of Management‟. Satinder tells him that these principles are also a part of MBA course curriculum at the beginner‟s level as they form the core of management in practice. But he finds these principle different from those of pure science. In context of the above case: 1. Outline the concept of principles of management. 2. Why does Satinder find the principle of management different from those of pure science? 3. Why do the principles of management form the core of management in practice? Explain by giving any two points highlighting the importance of principles of management.

4)Aapka vidyalaya‟ believes in holistic development of students and encourages team building through a mix of curricular, co-curricular and sports activities. On its founders day a stage performance had to be put up. A committee of ten prefects was constituted to plan different aspect of the function. They all decided to use recycled paper for decoration. There was a spirit of unit and harmony and all members supported each other. With mutual trust and belongingness the programme was systematically planned and executed. Kartik, one of the prefects realized that unknowingly the group had applied one of the principles of management while planning and executing the programme. He was so inspired by the success of the function that he asked his father to apply to same principle in his business. His father replied that he was already using this principle. 1. Identify the principle of management applied for the success of the programme. 2. State any two features of management highlighted in the above para.

3. Identify any two values which „Aapka Vidyalaya‟ communicated to the society

5) Voltech India Ltd. is manufacturing LED bulbs to save electricity and running under heavy losses.To revive from the losses, the management thought of shifting the unit to a backward area where labour is available at a low cost. The

management also asked the workers to work overtime without any additional payment and promised to increased to wages of the workers after achieving its mission. Within a short period the company started earning profits because both the management and the workers honoured their commitments.

1. State the principle of management described in the above para.

6)Telco Ltd. is manufacturing files and folders from old clothes to discourage use of plastic fields and folders. For this, they employ people from nearby villages where very less job opportunities are available. An employee, Harish, designed a plan for cost reduction but it was not welcomed by the production manager. Another employee gave some suggestion for improvement in design, but it was also not appreciated by the production manager. 1. State the principle of management described in the above para.

2. Identify any two values that the company wants to communicate to the society.

7) Study Buddy Pvt.‟ Is company dealing in stationery items. In order to establish standards of excellence and quality in materials and in the performance of men and machines, the company adheres to benchmarks during production. Moreover, its products are available in limited varieties, sizes and dimensions thereby eliminating superfluous diversity of products. Identify the technique of scientific management which has been adopted by „Study Buddy Pvt. Ltd.‟

PLANNING

1. Offering 30% jobs to women.‟ What type of plan is it ? 2 During partition, KundanLal came to Mumbai from Lahore with a lot of wealth. Keeping in view his innate ability to visualize and create things, he decided to work as a junior assistant in a film studio. Over a period of time, as he gained experience and his work was well acclaimed, he decided to set up his own film studio. Initially he was himself looking into every aspect of the business, but as his work increased manifolds and his own productivity reduced with age, he hired Jummy as manager. Jimmy being immature in his work started giving bookings for the studio haphazardly. He would never decide anything in advance or do any kind of forecasting of events. This led to lot of confusions and conflicts. As a result, the goodwill earned by KundanLal over the years began to decline. In context of the above case: 1. Identify and explain the function of management which Jimmy failed to

1. perform by quoting lines form the paragraph.

3 The management of ABC Ltd. set up the target of selling 10,000 units per week and made all their plans based on this target. But due to change in technology adapted by competitors which reduced their cost, the ABC Ltd. could not achieve their target. (i) Identify the limitation of planning discussed in the above para.

(ii) State any other two limitations.

4. Puneet electronics decides to sell television sets though exchange of old television sets. What type of plan is it ? 5. .Mc Donald co. does not give its franchise to any other co. Which is running food business. This is related to which type of plan ? 6. Planning involves choice “Elaborate 7. “No smoking in office “ is an example of which type of plan? 8. Name the function of management is considered a base for all other Function 9. Name the plan which specifies a detail step by step presentation of a job? 10. A company allows only eight leave for his employees during one year Which type of plant is it? 11. Without one function of management the controlling function is not possible. Name the concerned function. 12 A company is manufacturing garments. The manager wants to increase profits by purchasing new high speed machines or increasing the sale price or using waste material in manufacturing stuffed toys. He decided that „using waste material‟ to increase the profit is the best solution for him. 1. Identify the concept of management involved. 2. Mention the steps involved in the above process by quoting the line from the question. 3. To complete the process of the concept identified in (a), what two next steps does the manager have to take? Explain