HOLIDAY HOME WORK CLASS XII - Kendriya Vidyalaya ...

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Aug 15, 2012 (5 years and 1 day ago)

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Assignments for summer vacations

XII
-
C, E

(Writing Section)

1)

You are Sandhya,President of ‘Literary Club’. Draft a notice for your Vidyalaya giving necessary
details and inviting students of class IX
-
XII for a ‘Literary Quiz’ to be held in your Vidyalaya

itself.

2)

You are the Head Boy/Head Girl of your school; you are organizing a Career Counseling for XI
and XII std. students of your school. Write a notice giving details of it to be displayed on your
school Notice board.

3)

Draft a Poster on ‘Save Environment

from Pollution’.

4)

Draft a poster on ‘Importance of Reading Books’.

5)

Write an informal invitation to your friend inviting him/her to the Golden Jubilee celebrations
of your parent’s marriage.

6)

You are Sajjan S/O Sh. Dhanraj of Aman Nagar,Patiala. Your Father
wants you to draft a formal
invitation to be sent on the occasion of your sister, Anita’s marriage. Prepare the invitation.

7)

You have been transferred to another city. You want to sell certain household goods. Give a
suitable advertisement to be published i
n a newspaper.

8)

Write an advertisement in not more than 50 words for nurses required to serve in US and UK.
You are A.B.C Ltd., Delhi. Rh
-
011
-
112233

9)

You attended a Camp for Scouts and Guides celebrating the 100
th

years of Scouts and Guides
movement in, Punjab. As a reporter of ‘The Tribune’, write a report in 100
-
125 words for your
newspaper. Sign as Yogesh.

10)

Strikes and bandhs put the general public to a great inconvenience. Write a letter to Editor of a
newspaper

regarding the nuisance caused by strikes and bandhs. You are Ranjan of #82,
Darshan Nagar, Patiala.

11)

Today’s society is facing with many problems due to lack of morality. The children are
becoming more and more quarrelsome and naughty. The increase of co
rruption is also raising
questions. Rishi/Rashmi feels that there is urgent need of Moral Education in the schools.
Write the article.



(Learning Section)

Test of all lessons (only done) after Summer Vaca
tions.


अवकाशीय



हकायय

कक्षा
:
-

बारहव ीं

1.


रचनात्मक

लेखन

फ़ीचर

ललखें
-




शहरी

ज वन

में

बढ़त

व्यस्तता।




फ़ास्टफ़



का

मजा

,
सेहत

को

सजा।




भारत य

ककसनों

की

समस्या।




लोकीवन

में

बसत

भारत य

सींस्क

तत।




घटते

लस्तर

से

पान की

समस्या।

2
व्याकरण

भाग

से
-




वाक्य

के

प्रकार
(
रचना
,
अर्थ
)
से

5
-
5
उदाहरण

ललखें।




उपसगथ
,
प्रत्यय

से

10
-
10
उदाहरण

ललखें।




समास
,
ववलोम
,
समश्र

तत

लभन्नार्थक

शब्दों

के

10
-
10
उदाहरण

ललखें।

3
अपने

राज्य

से

सींबींधित





लोकग तों

का

सींकलन

करें

तर्ा

उन्हें

ककस



अवसर

पर

गाया

जाता

है
,
ललखें।


अर्वा

अवकाश

के

दौरान

ककन्हीीं

10
ददनों

की

डायरी

ललखें

(
समय
,
ततधर्

सदहत
)



*********************************

Holiday Home Work

Subject: Mathematics

Class : XI

1.

Prepare for Maths Olympiad. Test on 3
rd

July, 2012. For more information go to
pioneermathematics. Com


Holiday Home Work

Subject: Mathematics

Class : XII

1.

Prepare for Maths Olympiad. Test on 3
rd

July, 2012. For more information go to
pioneermathematics. Com

2.

Questions from previous years quest
ion papers 2008, 2009,2010, 2011,2012 from the topics


1.

Relations and Functions

2.

Inverse Trig. functions.

3.

Matrices and Determinants.

4.

Introduction to continuity and diff.







KENDRIYA VIDYALAYA
-
2 PATIALA (DMW)

HOLIDAY HOME WORK FOR SUMMER VACATION

HOME WORK FOR CLASS XII PHYSICS

1

Learn the Chapter No.
-

1 to 3 including all textbook questions.

2

Watch Discovery Channel, National Geographic Channel, Gyan Dharshan Channel, etc.,

3

Read magazines like Physics Today, Science Reporter, CSR, etc., and learn important facts.

4

Solve previous 5 years question papers of CBSE (Questions related to first 3 units only)Delhi, All India
and foreign addition.SET I ,SET II AND SET III)

5

Practic
e writing good answers at correct speed

6

Maintain Log Book (Daily) with Parents Signature (EXAMPLE IS GIVEN BELOW)


S.NO

DATE

TOPIC STUDIED

TIME OF STUDY

SIGN OF PARENT



1

16.5.2012

CHARGING BY
INDUCTION

6 AM
-

8 AM



ASSIGNMENTS

Electrostatics

1.

Define

electric field intensity and derive the expression for electric field intensity at any (r,α)
due to an electric dipole and hence calculate its value at axial point and equivalent point of
dipole respectively.

2.

Gauss theorem in electrostatics and apply it c
alculate the electric field intensity at a period
a)due to charged wire of charge density ‘ λ’ b)due to an infinite plane charged sheet.

3.

(2) An electric dipole of length 10 cm having charges ±6 x 10
-
3
C placed at 30
o

with uniform
electric field and potent
ial energy of the dipole.

4.

1) sketch two equipotential surfaces for a uniform electric field & for a point change
separately.Define electric potential & equipotential surface & also establish the relation
between electric & electric


2) Find the valu
e of electric field which balances the weight of an electrons.

5. Define capacitance & derive the expression for capacitance of a parallel plate capacitor. If a
dielectric slab of thickness ‘t’ & a metallic slab of thickness ‘t
o
’ are introduced one by one between the
place of capacitance. In which case would the capacitance be move and why.

6.) a) Derive the expression for energy shred & energy density of a parallel place capacitor. B)
Calculateequivalent capacitance between poin
ts A & B


A

C
1

C
2

C
3

C
4

B


Where C1 = 5µf C2 = 10µf C3=15 µf C4=30 µf

7) a) State and prove Gauss’s theorem and apply it calculate the electric field intensity at a point
due to a charged spherical shell.


b) S
1
& S
2

are two hollow concentric spheres enclosing charges Q & 2Q respectively as shown in
figure. Find the ratio of electric flux through S1 & S2 and how the electric flux through S1 change if
medium of dielectric constant S is introduced in space inside S in a

place of air.

8. (1) Describe the principal, construction & working of a van dee
-

graff generator with the help of
labeled diagram, how is the leakage of charge with minimized from this generator?

(2) in a van
-

dee graff generator a spherical metal shel
l is to be a 15*10
6
V electrode. The
diaelectric strengthof gas surrounding the electrode is 5*10
6
V/m. find the radius of spherical shll
required.

9. (1) describe the expression for electric potential at any point sue to electric potential at any point
due

to an electric dipole and hence calculate its value on axial line and equatorial line respectively.

(2) a point charge of +2µc is kept fixed at origin. Another point of charge of +4µc is brought from a far
point to a point distance 50cm from the origin. C
alculate electric potential energy of this two charge
system. Another charge of +1µc is brought to a point 100cm from each of these two charges. What is
the work done?

10. a)Three charges
-




µc ,





µc &
-





µc are arranged along a straight line as s
hown in fig.
calculate the total elec. Field intensity due to all charges at P.

b) A point charge +10 µc is at a distance 5cm directly above the Centre of square of side 10cm.
Find the electric flux through the square faces.

c) Two parallel plates PQ & RS

are kept at a distance ‘d’ apart. Area of each plate is A. the space
b/w them is filled with three dielectric slabs of identical size having dielectric constants K1, K2 &
K3 respectively as shown in figure. Find the capacitance of the capacitor.

CURRENT
ELECTRICITY

1)

a) Define EMF & terminal voltage of all a cell. Derive the expression for internal resistance of a
cell.

b) A wire of resistance 10Ω is starched to double its length at constant temp. How does its
resistance & resistivity change?

2. (a) define
drift velocity and derive the expression in terms of relaxation time. Also establish the
relation between drift velocity and current.

(b) a carbon resistor of 47 KΩ is to be marked of rings of different colours for identification. Write the
sequence of col
ours?

3. (a) state Kirchoff’s law & apply it to obtain this balanced condition wheat stone bridge

(b) two cells of emf 1.5V & 2V and internal resistance 1Ω & 2Ω respectively are connected in parallel
to pass a current in the same direction through an ext
ernal resistance of 5Ω. Calculate the potential
difference across 5Ω resistance ?

4) a) write the principle of meter bridge and apply it to calculate the unknown resistance.

b) Find X and current drawn by the circuit from the battery if no current flows
through
Galvanometer if resistance per unit length of wires AB in 0.01Ω/cm.


5.(1) write the principle of potentiometer and apply it to compare this emf of two cells.

(2) the resistance of potentiometer wire of length 10m in 25 Ω . a resistance box and a
2V battery are
connected in series with it. What resistance should be introduced in the box to have a potential drop
of one microvolt per millimeter of potentiometer wire?


6. (1) define the term current density of a metallic conductor. Deduce the relatio
n connecting
current & conductivity of the conductor when the electric field is applied to it.

(2) Define resistivity and state is S.I unit. State & explain how the resistivity of a conductor
varies with temperature?

7)1) A potential difference of 2 volt
is applied between the points A & B as shown in figure.
Calculate(R=2Ω)


a)equivalent resistance of network across the points A&B.

b)the magnitudeof current in arms AFCEB & AFDEB.

2)AB is 1m long uniform wire of 10Ω resistance .the other data are shown
in circuit
dia.calculate a)potential gradient along AB. b)length AO of the wire when galvanometer
shown no deflection

8. in the given network calculate the value of electric current I
1
,I
2
,I
3
Kirchhoff’s law.

9. a wire of resistance 4R is cut into equal

parts. Each part is stretched to twice of its original
length. If all four wires after stretching are connected in parallel. Calculate equivalent
resistance of the combination.

10. (1) two identical cell of emf 1.5V each are joined in parallel providing
supply to an external
circuit consisting of two resistance of 13Ω each joined in parallel . a very high resistance
voltmeter reads the terminal voltage of cell to be 1.4 V. find the internal resistance of each
cell?

(2) the variation of potential differen
ce V with length ‘L’ in case of two potentiometer A & B as
shown in fig. which one will you prefer for comparing emf of cell & why.




V

B


A


L


KENDRIYA VIDYALAYA
-
2 PATIALA (DMW)

HOLIDAY HOME WORK FOR SUMMER VACATION

S.NO

ASSIGNMENT

HOME
WORK FOR CLASS 12
TH
CHEMISTRY

1

Learn the Chapter No.
-

1 to 4 including all textbook questions.

2

Watch Discovery Channel, National Geographic Channel, Gyan Dharshan Channel, etc., daily and
prepare a daily report on it.

3

Read magazines like Chemistry Toda
y, Science Reporter, CSR, etc., and learn important facts.

4

Solve previous 5 years question papers of CBSE (Questions related to first 4 units only)Delhi, All India
and foreign addition.

5

Maintain Log Book (Daily) with Parents Signature i.e., Sr.No., Dat
e, Topic Studied, Parents Signature.


ASSIGNEMENT

SOLID STATE 1

Q .1
Niobium crystallises in body
-
centred cubic structure. If density is 8.55g cm

3, calculate
atomic radius of niobium using its atomic mass 93 u.


Q .
2
Silver crystallises in fcc

lattice. If edge length of the cell is 4.07 10

8cm and density is
10.5 g cm

3, calculate the atomic mass of silver.

Q 3
Niobium crystallises in body
-
centred cubic structure. If density is 8.55g cm

3, calculate
atomic radius of niobium using its atomic mas
s 93 u


Q 4 Copper crystallises into afcc lattice with edge length 3.61 10

8 cm.Show that the
calculated density is in agreement with its measuredvalue of 8.92 g cm

3.


Q 5 Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions

of nic
kel exist as Ni2+ and Ni3+ ions?

Q 6 Ferric oxide crystallises in a hexagonal close
-
packed array of oxide ionswith two out of
every three octahedral holes occupied by ferric ions.Derive the formula of the ferric oxide.


Q 7
Gold (atomic radius = 0.144 nm)
crystallises in a face
-
centred unit cell.

What is the length of a side of the cell?

Q. 8
In terms of band theory, what is the difference(i) between a conductor and an insulator(ii)
between a conductor and a semiconductor?


Q.9
Explain the following terms wit
h suitable examples:

(i) Schottky defect (ii) Frenkel defect (iii) Interstitials and (iv) F
-
centres.

Q.10
Explain the following with suitable examples:

(i) Ferromagnetism

(ii) Paramagnetism

(iii) Ferrimagnetism

(iv) Antiferromagnetism

(v) 12
-
16 and 13
-
15
group compounds.

Q.11
What type of stoichiometric defect is shown by:

(i) ZnS (ii) AgBr

Q.12
A group 14 element is to be converted into n
-
type semiconductor by doping

it with a suitable impurity. To which group should this impurity belong?


Q.13
What type of
substances would make better permanent magnets,

ferromagnetic or ferrimagnetic. Justify your answer.

Q.14
Name the parameters that characterise a unit cell.


Q.15
Distinguish between

(i) Hexagonal and monoclinic unit cells

(ii) Face
-
centred and end
-
centred u
nit cells.

SOLUTIONS
-

2


Q.1 Calculate the mole fraction of benzene in solution containing 30% bymass in carbon
tetrachloride.


Q.2
H2S, a toxic gas with rotten egg like smell, is used for the qualitative analysis. If

the solubility of H2S in water at STP i
s 0.195 m, calculate Henry’s law constant.

Q.3
The vapour pressure of pure benzene at a certain temperature is 0.850bar. A non
-
volatile,
non
-
electrolyte solid weighing 0.5 g when added to39.0 g of benzene (molar mass 78 g mol
-
1).Vapour pressure of the solut
ion,then, is 0.845 bar. What is the molar mass of the solid
substance?


Q.4

200 cm3 of an aqueous solution of a protein contains 1.26 g of theprotein. The osmotic
pressure of such a solution at 300 K is found tobe 2.57 10
-
3 bar. Calculate the molar mass of

the protein.


Q.5
Why do gases always tend to be less soluble in liquids as the temperatureis raised?

Q.6
State Henry’s law and mention some important applications?

Q.7
What is meant by positive and negative deviations from Raoult's law and how is

the sign o
f
Δ
mixH related to positive and negative deviations from Raoult's law?

Q.8
Heptane and octane form an ideal solution. At 373
K
, the vapour pressures of

the two liquid components are 105.2 kPa and 46.8 kPa respectively. What will

be

the vapour pressure of a mixture of 26.0 g of heptane and 35 g of octane?

Q.9 Two elements A and B form compounds having formula AB2 and AB4. When

dissolved in 20 g of benzene (C6H6), 1 g of AB2 lowers the freezing point by

2.3
K
whereas 1.0 g of AB4
lowers it by 1.3
K
. The molar depression constant

for benzene is 5.1
K
kg mol

1. Calculate atomic masses of A and B.

Q.10
Nalorphene (C19H21NO3), similar to morphine, is used to combat withdrawal

symptoms in narcotic users. Dose of nalorphene

generally given is 1.5 mg.

Calculate the mass of 1.5


10

3 m aqueous solution required for the above dose.

Q.11
Calculate the depression in the freezing point of water when 10 g ofCH3CH2CHClCOOH
is added to 250 g of water.
K
a = 1.4 10

3,
K
f = 1.86K kg mol

1.


Q.12
19.5 g of CH2FCOOH is dissolved in 500 g of water. The depression in the freezingpoint
of water observed is 1.00 C. Calculate the van’t Hoff factor and dissociationconstant of
fluoroacetic acid.


Q13 Henry’s law contant for the molality of methane

in benzene at 298
K
is4.27 105 mm Hg.
Calculate the solubility of methane in benzene at 298
K
under 760 mm Hg.


Q.14
100 g of liquid A (molar mass 140 g mol

1) was dissolved in 1000 g of liquid B

(molar mass 180 g mol

1). The vapour pressure of pure liquid
B was found to be

500 torr. Calculate the vapour pressure of pure liquid A and its vapour pressure

in the solution if the total vapour pressure of the solution is 475 Torr.

Q.15
Determine the osmotic pressure of a solution prepared by dissolving 25 mg of

K2
SO4 in 2 litre of water at 25° C, assuming that it is completely dissociated.

ELECTROCHEMISTRY
-

3


Q.1
Calculate the equilibrium constant of the reaction:

Cu(s) + 2Ag+(aq)

Cu2+(aq) + 2Ag(s)


cell

E
V
= 0.46 V

Q.2

The standard electrode potential for
Daniell cell is 1.1V. Calculatethe standard Gibbs energy for
the reaction:

Zn(s) + Cu2+(aq)

Zn2+(aq) + Cu(s)

Q.3
Ë
m

for NaCl, HCl and NaAc are 126.4, 425.9 and 91.0 S cm2 mol

1respectively. Calculate

o for
HAc.


Q.4
A solution of CuSO4 is electrolysed f
or 10 minutes with a current of1.5 amperes. What is the mass
of copper deposited at the cathode?


Q.5
Consider the reaction: Cr2O72


+ 14H+ + 6e



2Cr3+ + 7H2O

What is the quantity of electricity in coulombs needed to reduce 1 molof Cr2O72

?


Q.6
Depict the

galvanic cell in which the reaction

Zn(s)+2Ag+(aq)

Zn2+(aq)+2Ag(s) takes place. Further show:

(i) Which of the electrode is negatively charged?

(ii) The carriers of the current in the cell.

(iii) Individual reaction at each electrode.


Q.7
Calculate the s
tandard cell potentials of galvanic cell in which the followingreactions take place:

(i) 2Cr(s) + 3Cd2+(aq)

2Cr3+(aq) + 3Cd

(ii) Fe2+(aq) + Ag+(aq)

Fe3+(aq) + Ag(s)

Calculate the

r
G

and equilibrium constant of the reactions.


Q.8
In the button cells
widely used in watches and other devices the following

reaction takes place:

Zn(s) + Ag2O(s) + H2O(
l
)

Zn2+(aq) + 2Ag(s) + 2OH

(aq)

Determine

rG

and
E

for the reaction.


Q.9 The resistance of a conductivity cell containing 0.001M KCl solution at 298K i
s 1500

. What is
the cell constant if conductivity of 0.001M KClsolutionat 298 K is 0.146 × 10

3 S cm1.


Q.10
Conductivity of 0.00241 M acetic acid is 7.896 × 10

5 S cm

1. Calculate its

molar conductivity. If 0
m

for acetic acid is 390.5 S cm2 mol

1, what

is itsdissociation constant?


Q.11
How much charge is required for the following reductions:

(i) 1 mol of Al3+ to Al?

(ii) 1 mol of Cu2+ to Cu?

(iii) 1 mol of MnO4


to Mn2+?


Q.12
How much electricity in terms of Faraday is required to produce

(i) 20.0 g of

Ca from molten CaCl2?

(ii) 40.0 g of Al from molten Al2O3?



Q.13
Three electrolytic cells A,B,C containing solutions of ZnSO4, AgNO3 and CuSO4,respectively are
connected in series. A steady current of 1.5 amperes waspassed through them until 1.45 g of sil
ver
deposited at the cathode of cell B.How long did the current flow? What mass of copper and zinc were
deposited?


Q.14
Predict the products of electrolysis in each of the following:

(i) An aqueous solution of AgNO3 with silver electrodes.

(ii) An aqueous
solution of AgNO3 with platinum electrodes.

(iii) A dilute solution of H2SO4 with platinum electrodes.

(iv) An aqueous solution of CuCl2 with platinum electrodes.


CHEMICAL KINETICS
-

4


Q.1

The initial concentration of N2O2 in the following first order reaction

N2O5(g)


2 NO2(g) + 1/2O2 (g

was 1.24 10

2 mol L

1 at 318 K. Theconcentration of N2O5 after 60 minutes was 0.20 10

2
mol L

1.Calculate the rate constant of the reaction at 318 K.


The rate of the chemical reaction doubles for an increase of 10K in absolute

temperature from 298K. Calculate
E
a.


Q.2
A reaction is second order with respect to a reactant. How is the rate of

reaction affected if the concentration of the reactant is

(i)

doub
led (ii) reduced to half ?


Q.3
A reaction is first order in A and second order in B.

(i) Write the differential rate equation.

(ii) How is the rate affected on increasing the concentration of B three times?

(ii)

How is the rate affected when the concentrations
of both A and B are doubled?


Q.4
The half
-
life for radioactive decay of 14C is 5730 years. An archaeological

artifact containing wood had only 80% of the 14C found in a living tree.

Estimate the age of the sample.

Q.5
The experimental data for decomposition

of N2O5

[2N2O5


4NO2 + O2]

in gas phase at 318K are given below:

t
/s 0 400 800 1200 1600 2000 2400 2800 3200

102 [N2O5]/ 1.63 1.36 1.14 0.93 0.78 0.64 0.53 0.43 0.35

mol L

1

(i) Plot [N2O5] against
t
.

(ii) Find the half
-
life period for the reaction.

(iii
) Draw a graph between log[N2O5] and
t.

(iv) What is the rate law ?

(v) Calculate the rate constant.

(vi) Calculate the half
-
life period from
k
and compare it with (ii).

Q.6
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 its 1/16th

value?

Q.7
For a first order reaction, show that time required for 99% completion

is twice the time required for the completion of 90% of reaction.

Q.8
A first order reaction takes 40 min for
30% decomposition. Calculate t1/2.


Q.9
The rate constant for the decomposition of hydrocarbons is 2.418 10

5s

1

at 546 K. If the energy of activation is 179.9 kJ/mol, what will be the value

of pre
-
exponential factor.

Q.10
Sucrose decomposes in acid solution

into glucose and fructose according

to the first order rate law, with
t
1/2 = 3.00 hours. What fraction of sample

of sucrose remains after 8 hours ?

Q.11
The decomposition of A into product has value of
k
as 4.5 103 s

1 at 10

C

and energy of activation 60 k
J mol

1. At what temperature would
k
be

1.5 104s

1?

Q.12
The time required for 10% completion of a first order reaction at 298K is

equal to that required for its 25% completion at 308K. If the value of
A
is

4 1010s

1. Calculate
k
at 318K and
E
a.

Q.13
The
rate of a reaction quadruples when the temperature changes from

293 K to 313 K. Calculate the energy of activation of the reaction assuming

that it does not change with temperature.



PROJECT FOR CLASS 12
TH

CHEMISTRY

1.

Collect information/data related to the

project as per allotted in the classroom.

2.

Prepare a rough sketch and collect information related to the Model for Science Exhibition as
per allotted in the classroom








Class
-

XII B

Holiday homework


Biology


1.

Learn and write the short answers of all
the questions of test papers 1


4.

2.

Go through the contents of chapter 1 to 5 thoroughly and learn them for the revision test.

3.

Answer the following questions in detail with diagrams and learn them :
-

a)

Explain the events involved in the
development of female

gametophyte

and also explain the
eight nucleate and seven celled stage
.

b)

List all the events taking place starting from the
landing of pollen grains

in the
stigma till the
fertilization of ovule
. Support your answer with diagram(s).

c)

Explain the different s
tages in embryo development in
dicots
. Draw L.S.
monocot embryo.

d)

Write the difference between
oogenesis

and
spermatogenesis
. Draw the diagrams also.

(*You may write it in tabular form so that it is easy to go through and remember)


e) Explain all th
e
phases of menstrual cycle

with diagram along with the
role of the


hormones involved.

e)

Explain
Mendel’s dihybrid cross

and
law of independent assortment
.

f)

Learn and write the important definitions from
Genetics
.

4.

Go
through the HOTS related to first five chapters (already been provided to you) thoroughly.

5.

Collect information and data related to the selected investigatory project from newspapers, health
magazines, internet, T.V., etc.

6.

*Maintain a log (as shown below
) duly signed by the parents showing the regularity of work.



*Divide your work in parts/splits and maintain continuity and regularity.


“Wishing you enjoyable and educative holidays”

HOME WORK FOR 12
TH

CLA
SS (ACCOUNTANCY)



To solve practical problems related to retirement of a partner from question no. 1 to 34.



To solve sample papers issued by CBSE for topics covered before summer break.



To practice questions related to Admission of a partner, Fundamental, V
aluation of Goodwill
and retirement of a partner.



To prepare Master cards for all chapters and maintain log book carrying date wise recording
of practice done.



To prepare Power point presentation on Goodwill, intt on capital, intt on drawings etc.

BUSINES
S
-
STUDIES

1 Write down following questions:



Name the method of training in which the trainee learns under the guidance of master
worker?



“Staffing is the least important function of management in an established organization” Do
you agree? Give
reasons.



Despite of internal sources of recruitment being economical, why do companies not always
use this source? Explain reasons.



“Some learning opportunities are designed and delivered to improve skills and abilities of
employees whereas some others ar
e designed to help in growth of individuals in all
respects” Identify and explain the two concepts explained above.



Differentiate between ‘on the job training’ and ‘off the job training’.



“A newly appointed personnel manager is of view that there is no ne
ed of training to old
employees” Do you agree? Give reasons in support of your answer?

2


To revise the whole syllabus covered before summer break.

3

To solve the CBSE Sample papers and HOT Questions given in book.

HOLIDAYS’ HOME WORK CLASS
-
XII D & E

SUBJECT
-

ECONOMICS


1.Define ppc . explain the following problems with the help of ppc:

a. How to produce

b. Fuller utilization of resources

c. growth of resources

2. What is MOC? Why PPc is concave to origin?

3. Explain the relationship between TU & MU.


4. What is consumer’s equilibrium ? Explain it

a. single commodity

b. Two commodities

c. indifference curve

5.What is budget line? When it changes?

6.What is MRSxy? Why indifference curve is convex to origin?

7.Explain various properties of indifference c
urve.

8. State & explain law of demand.

9. Differentiate between change in demand & change in quantity demanded.

10. Explain the causes of rightward shift in demand.

11. What is demand function?

12.What is Ed ? Explain any four factors affecting demand.

1
3. Draw the demand curve with Ed>1, Ed<1,Ed=1,Ed=0,Ed=infinity

14.Numericals (any 5) of Ed


15.explain the point method & Expenditure method of measuring Ed.

16.State & explain law of variable proportions.

17.Explain the relationship between AC & MC.

18
.Can AC & AVC meet each other ? Why ? Why not ?

19 Differentiate between fixed & variable cost.

20.Numericals of cost (any 5)

21.Explain the relationship between TR,AR&MR

22.State & explain the law of supply.

23.Differentiate between change in supply & cha
nge in supply.

24.Explain any 4 causes of leftward shift in ss curve.

25 What is ES ? Explain any 4 factors affecting ES.

26.Any five numericals of ES

27. Draw ss curve Es>1,Es<1,Es=0,Es=1, Es=infinity

28.Define producer’s equilibrium? Explain its conditio
ns.

29.Differentiate between perfect competition, monopolistic competition, monopoly &
oligopoly.

30.What is equilibrium price ? How it is determined?

31.What happens to equilibrium price & quantity when:

a. increase in demand

b. decrease in demand

c. incr
ease in supply

d. decrease in supply

e.increase in both demand & supply

f. decrease in both demand & supply

32. Define barter system. Explain its limitations.

33.Explain various functions of money.

34. Explain the process of credit creation by commercial b
ank.

35.Explain all the functions of central bank..

36.Define budget. Explain its various objectives.

37. Differentiate between :

a.direct & indirect tax

b.revenue & capital receipts

c.revenue & capital expenditure

d.development &

non
-

development expenditure.

e. plan & non plan expenditure.

38.What is revenue deficit ? Explain its implications.

39.What is fiscal deficit ? Explain its implications.

40.What is primary deficit ? Explain its implications


HOLIDAY HOMEWORK SUMMER BREA
K

GEOGRAPHY

Class XIIE

Assignment: 1. All the questions given in exercise of each chapter taught.


2 Practical work based on statistical data geographical

Project: Collection of information regarding visited place during vacation.




Homework for summer vacation

CLASS 12th E (HISTORY)

ASSIGNMENT
--
Identify the important cities of Harappa/Sindhu

Civilization, locate them on physical map of India and write important features of that place.

PROJECT
---

Collection of pictures related to

archeological sources, paste them on scrap book and
comment on the sources.

Holiday Homework

Sub: Informatics Practices

Unit1 :

I Define Network




ii Difference between MAC address and IP address.

III Define Domain Name Resolution

IV Define
topology & name its types.

IV Define crosstalk




V Define Repeater


VI Define Gateway


VII Snooping





VIII Modem



IX expand: jpeg , ODF ( 1 X
9=9)

(b) ______cable uses light to transmit data.


_____ on a network is your computer’s uniqu
e hardware number.


--------

is the numbered address that identifies website uniquely on the internet


------

is the mechanism that obtains IP address using URL of a website.




(0.5 X
4=2)

(c ) (i) Na
me any two Indian scripts included in Unicode.



(ii)Sujata says that the following numbers indicate an address


208.77.188.166

What is the above address called? To which object/device is it assigned?



(1 X
2=2)

(e) Which of the following software is an

Open Source:



Linux, MS Window7, Photoshop

Section B OPEN STANDARS

Define Following:

(i)

Free Software (ii) Open source software (iii) Floss

(ii)

(iv) Proprietary software Freeware (Vi) shareware (

VII) FSF





Expand Following:

OSS (II) FLO
SS (III) PHP (IV) TTF (V) ODF (VI) GNU


Which of the following are open standard and Proprietary standards


AIFF (ii) OGG (III) JPEG (IV) HTML (V) WMA (VI) RM

Section C
Java

1.

Define Data type. Name its type with example.

2.

Give an example that shows purpose of following methods:

I getText( ) ii parse( ) iii setText( ) iv jOptionPane.showMessageDialog( )

3.

Give Syntax of following:

a.

If else statement b. switch case sta
tement c. for loop d. while loop

e. do
-

while loop


4 Rewrite the following program code using for loop:





[2]

int i = 1, sum = 0;

while (i < 10)

{ sum += i;

i += 2;

}


5 Rakesh works in organization.

He wishes to create controls on a form for the


following functions. Choose appropriate controls from Text box, Label, Option


button, Check box, List box, Combo box, Command button, and write in the third


column.



[2]


S.No

Control used to

Co
ntrol

1

Enter last name


2

Enter Gender


3

Choose City from a list of cities


4

Submit form



6
The following code has some error(s). Rewrite the correct code underlining all the


corrections made.










[2]

int p, q =15;

p= = q + 15;

if

(p= =q)

{

jTextField1.setText(“p and q are unequal”);



jTextField2.setText(“they are not equal”); break;

}


7 Mr. Nayak has developed a Java application for a school, in which, a combo box is made on
the form for selecting class. Name the property wh
ich Mr. Nayak should use to add the
class’s data in combo box.




8
What will be the output produced by following code fragment?


(2)


flaot x=9;


float y=5;


int z=(int)(x/y);


switch(z)


{


case1:x=x+2;


case2: x=x+3;


default:x =x+1;


}


system.out.println(“value of x:”+x);


9 Richika

is a programmer at Alpha Builders. To calculate wages to be paid to labourers she
has developed the following GUI in Netbeans






[8]



Male and Female labourers are respectively paid at the rate of Rs. 140/
-

per day and Rs. 160/
-

per day. Skilled labo
urers are paid extra at the rate of Rs. 50/
-

per day.

(i)

What should be done so that only one of the radio button (Male and Female) can be
selected at a time ?

(ii)

Write code to do the following :

a)

Calculate and display the Total wages in corresponding label w
hen the “Calculate
Wages” button is pressed.

b)

Clear the Name and No. of days worked text fields.

c)

Close the application when the “STOP” button in pressed.

(Assume any suitable names for various controls on the form)


10 Rewrite the following if
-
else segment using switch
-
case statement






char ch='A';


if(ch=='A')


System.out.println("Account");


if((ch=='C') || (ch=='G'))


System.out.println("Admin");


if(ch=='F')


System.out.println("Advisor");

11. ) What will be the output of the following program code when the user will press JButton:


2


Public class svm

{

int a;

svm(int p)

{

a=p;


}

void assign(int no)

{

a=no;


}

int disp()

{

return a;

}


}


private void jButton1ActionPerformed(java.awt.event.ActionEvent evt)


{


svm os=new svm(15);


System.out.println(“ “ + os.di
sp());


os.assign(35);


System.out.println(“ “ + os.disp());


}

12 Write a method to in java to find whether a given number is even or odd.

13 Create

a java desktop application to find the area of circle, rectangle, circumference of circle and
area of square.

Formula to calculate various things are

Area

Circumference/Perimeter

Circle

Rectangle

Square

Circle

Rectangle

Square





䰠 x B

卩Se
2







⬠㉂

㑸卩4e



Control Type

Control Name

Jpanel

JPanel1, JPanel2,

JtextField

JTxtlength, JTxtbreath, JTxtradius, JTxtside,

Button

JBtnCalculate

JradioButton

Jrbcircle, Jrbrectangle, Jrbsquare

JcheckBox

Jchkarea, Jchkperimeter, Jchkcircumference

Jlabel

Jlblresult


(b)

Write the code for respective radiobutton to make available the display textbox control, which are
appropriate for different object (Circle, Rectangle, Square) operation.







2

Write the code for calculate button to calculate the
desired operation which you choose from radio
button and check box






14 Write a class that will have following mebers


Sname string


M1 float


M2 float

Public : resul
t( ) takes marks in three subjects as parameters and total marks of student.

15
IV Write Java code that
takes a number

from jTextField1 and displayed
its table

in jTextArea1.

(2)





(e.g 6*1=6




6*2=12




…………..




6*10
=60)

16 Name the
property of jPassword

which
sets the character

that will be displayed instead of Text









Unit 2


I
Name the
property of jPassword

which
sets the character

that will be displayed instead


of Text.


II What will be the value of P and Q after execution of the following code?

(2)



int P,Q = 100



for (P=10; P<12; P++)



{




Q+ = P;



}



JOptionPane. showMessageDialog(this, “p + “+P
+” Q;”+Q+” );


IV Write Java code that
takes a number

from jTextField1 and displayed
its table

in jTextArea1.

(2)





(e.g 6*1=6




6*2=12




…………..




6*10=60)

Write Java code that
takes a number

from jTextField1 and displayed
its table

in jTextArea1.

(2)





(e.g 6*1=6




6*2=12




…………..




6*10=60)


Name the
property of jPassword

which
sets the character

that will be displayed instead of Text


A phone number, consisting
of 10 digits, is stored in a string variable strPhone. Now it is required
to store this phone number in a Long type variable lngPhone. Write Java statement to do
this.

Write the result stored in jTextField1 by the following statement:

(½)



jTextField1.set
Text(“Informatics”.substring(3));

Rewrite the following program code using a for loop:

(2)



int i=1, sum=0;



while (i<10)



{

sum+=i;




i+=2;



}


Write different methods of JOptionPane Class.

The following code has some error(s). Rewrite the correct co
de underlining all the corrections
made:



Int i, j=5;



i==j+5;



if(i=j)



{

jTextField1.setText(“i and j are unequal”);




jTextField2.setText(“they are not equal”);

break;



}

else

jTextField1.setText(“i and j are equal”)

I) What

will be the constants of
jTextField1 and jTextField2

after executing the following code:





i) jTextField1.setText(Math.round(25.7)+ “ ”);

(½)




ii) jTextField2.setText(Math.pow(2,3)+ “ ”);

(½)


II) What will be the
contents
of F1 and F2

after the following code is executed?


(1)


String F1=”hello”, F2=”Friend”;


F1=F1.concat(F2);