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SOS HERMANN GMEINER SCHOOL
HOLIDAY HOMEWORK IX-XII 2018-19
Summer Vacations are just round the corner. To keep our little
champs indoors in
the sweltering heat and to utilize their time with constructive
and creative activities,
we are sending a few assignments that would help the children
get a grasp of the
work done in the school.
For The Parents
Be a Friend: Play games with your child like – Ludo,
Carrom-board or scrabble. Invest quality time with them. Remain
involved with the work they are doing.
Explore Nature: Take your child for morning walk, find names of
trees, cars, stones, flowers, etc. while going for a walk. Take
them out for a movie or park.
For The Students
‘Books Can Be Our Best Friends’
Reading time: Reading story books enhances Language and
Vocabulary development.
Make bed time reading a regular practice.
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CLASS IX
ENGLISH
1. Compose a poem on any of the agent of nature like Trees,
Rivers, Wind,
Clouds, Flowers. The poem should be meaningful and must consist
3-4 stanzas.
Do on A3 size sheet creatively with the help of pictures.
2. Write a diary entry to record your feelings after being a
part of SEVAM campaign
to make Faridabad a clean city. You can give details how you
joined it and what
efforts are you doing to contribute this campaign.
3. Write an article in 120 – 150 words on any one of the given
topics:
1.Tourism in India, 2.Books are our best companions, 3.treatment
of
animals in circus, Beauty is in the eyes of beholder.
-Do above given Q.2 &3 on A4 size sheet creatively by
pasting pictures related to
the article. -Cover your English notebook nicely and beautifully
as such it speaks ‘I
am English notebook and the most decent one’.
MATHS
Practice ‘Number System, Polynomial line and angle in a separate
note book.
Practice 10 questions from each chapter mentioned above of R.S
agg. In a separate note book
HINDI
1. कोई भी दो अपठित गदय ांश और दो अपठित पदय ांश ठिखिए I
2.कोई दो औपच ररक और अनौपच ररक पत्र ठिखिए I
3. ठनबांध ठिखिए –
1.ठिपठि कसौटी जे कसे सोई स ाँचे मीत
जीिन में समरसत के ठिए ठमत्र की आिशयकत
जीिन में ठमत्र महत्वपूर्ण
सचे्च ठमत्र की परि और चुन ि
सच्ची ठमत्रत बन ए रिने के ठिए सतकण त
सच्च ठमत्र ठमिन सौभ ग्य की ब त
2.पररश्रम क महत्व
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सांस र में आज जो भी ज्ञ न –ठिज्ञ न की उन्नठत और ठिक स है ,उसक क
रर् है पररश्रम
पररश्रम करने में बौखि आर ठििेक आिश्यक
पररश्रम से ठमिने ि िे ि भ
उपसांह र
कोई एक ठनबांध अपनी इच्छ नुस र करें I
नोट : पूिण मध्य िठध प ठ्यक्रम य द करें ि ठििकर उसक अभ्य स करें
I
INFORMATION TECHNOLOGY
1. Find out 20 short question and 20 very short question from
each chapter 1. COMMUNICATION SKILLS 2. SELF-MANAGEMENT SKILLS
2. Learn each question and write in the computer copy. Project
Work:-
Make a PPT on disaster management or self-management Skill based
on your latest curriculum.
SCIENCE
1) Learn all answers of the following chapters-
(i) Matters in our surrounding
(ii) Motion
(iii) Fundamental units of life
2) Do the assignment given in class on separate note book.
TAKE CARE OF YOUR HEALTH, LEARN ANY ONE HOBBY OF YOUR CHOICE
AND
ENJOY YOUR HOLIDAYS.
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SOCIAL STUDIES
Prepare a project file with following details:
1. The total length of the project report should not be more
than 15 written pages of
foolscap size (A-4 size) sheet.
2. The project report should be handwritten and credit will be
awarded to original drawings,
illustrations and creative use of eco-friendly material.
3. The project report should be presented in a neatly bound
simple folder. 4. The project report should be developed and
presented in this order
a) Cover page: showing project title, student information,
school and year.
b) Certificate page c) Acknowledgements: (acknowledging the
institution, offices and libraries visited and
persons who have helped). d) Chapters: with relevant headings.
e) Summary and conclusions: based on findings. f) Bibliography:
should have the Title, author, publisher and if a website the name
of the
website with the specific website link which has been used.
Suggested Projects [Do any one project]
1. Identify the different hazards that your area is prone to and
list them into three broad
headings;viz; natural, socio-natural and human induced.
Enumerate some ways through
which the impact of these can be reduced. 2. Preparedness for a
disaster –Are you prepared ?Identify your role as a student , as
a
family member and as a member of RWA in pre, during and post
disaster situation 3. Mitigation strategy for natural disasters
like floods, earthquakes, landslides and cyclones. 4. Mitigation
strategy for human induced disasters like nuclear accidents,
chemical
and industrial accidents and biological disasters.
Community gets the first hand experience of
sufferings at the time of a disaster and becomes a
saviour of lives at the same time. Discuss the
community’s disaster preparedness and response
plan with suitable case studies.
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CLASS X
ENGLISH
1. Watch ‘Lagaan’ or ‘End Game’ movie. Write its plot/summary,
main
characters, your favorite character and moral.
2. Write biographical sketch of Nelson Mandela. It should be
comprehensive
and have more details than given in the concerned chapter of
your textbook.
3. Write formal letter of complaint for question 1 and 2 given
on page no. 81 in
English Assignment Plus.
4. Complete exercise 1, 2, 3, 4 on page no. 123 and 124,
exercise 1 and 2 on
page no. 113 in English Assignment Plus.
Question numbers 1, 2, 3 are to be done in English Communication
notebook and question no. 4 in Assignment Plus.
MATHS 1.Practice Polynomials,Linear Equations in two
variables,Quadratic Equations
2.10-10 Questions from each chapter need to be practiced from
R.S AGG.
HINDI
1. कोई भी दो अपठित गदय ांश और दो अपठित पदय ांश ठिखिए I
2. कोई भी तीन ठनबांध ठिखिए I
3.कोई दो औपच ररक और अनौपच ररक पत्र ठिखिए I 4.ठकसी भी ठिषय पर कोई
प ाँच ठिज्ञ पन ठिखिए I
नोट : पूिण मध्य िठध प ठ्यक्रम य द करें ि ठििकर उसक अभ्य स करें
I
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SOCIAL STUDIES
Prepare a project file with following details:
1. The total length of the project report should not be more
than 15 written pages of
foolscap size (A-4 size) sheet.
2. The project report should be handwritten and credit will be
awarded to original drawings,
Illustrations and creative use of eco-friendly material.
3. The project report should be presented in a neatly bound
simple folder.
4. The project report should be developed and presented in this
order
o Cover page: showing project title, student information, school
and year.
o List of contents: with page numbers.
o Certificate page:
o Acknowledgements: (acknowledging the institution, offices and
libraries visited and
persons who have helped).
a. Chapters: with relevant headings.
b. Summary and conclusions: based on findings.
c. Bibliography: should have the Title, author, publisher and if
a website the name of
the website with the specific website link which has been
used.
Suggested Projects [Choose any one topic out of A, B ,C or
D]
1. Every student has to compulsorily undertake any one project
on the following topics:
A: DISASTER MANAGEMENT:
1. Generating awareness on Disaster Management.
2. Role of government / non-government functionaries in your
locality in Disaster
Management.
3. Identify and design structure safety measures for
constructing disaster resistant
buildings. (earthquake, landslide, cyclone and flood resistant)
OR
B.Consumer Awareness OR C.Social Issues OR D.Sustainable
Development.
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INFORMATION TECHNOLOGY (level II)
1. Functional English (Intermediate) Chapter 1- 10 lines on each
topics
Writting a cover letter
Facing an interview
Writing a resume
Calling to find about a job vacancy
Appreciating someone
Describing a lost items
Saying no
Finding a place to stay
2. WEB APPLICATION (BASICS) Learn all the question answer and
multiple choice questions from the chapter given in the class and
write in the computer copy.
Project Work:-
Make a PPT on Web application and its uses based on your latest
curriculum
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SCIENCE
Revise/learn all the answers from the following chapters for
PRE-MID TERM Chemical Equations and Reactions
Life Process
Acid,Base and Salt
Control and Co-ordination
Electricity
Do the assignments uploaded on school website.
Ch-6 Life Processes
1 Which fluid in the human body wets the internal organs?
2 Where does the blood absorb oxygen in the human body?
3 Name the two parts of the plant through which gaseous waste
products are released into
the air.
4 Why do the walls of the trachea not collapse when there is
less air in it?
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5 Normally a vein opens into a large or into the heart but does
not end in capillaries. Which
one or more veins in human is/are exceptions to this rule?
6 Give reason for- the lung alveoli are covered with blood
capillaries.
7 Why is blood called liquid connective tissue?
8 Structure of leaf is complementary to its functions.
Explain.
9 Bije juice does not contain any digestive enzymes, yet it is
essential for digestion, why
so? Explain. 10 How do each of the following factors affect the
productivity in the process of
photosynthesis?
1. Temperature. 2. Water. 3. Carbon dioxide. 11 Why is it
necessary to separate oxygenated and deoxygenated blood in living
organisms? 12 What substance/substances are transported in plants
by
(1) Xylem vessels and tracheids?
(2) Sieve tubes (of phloem)? 13 Why is the inner wall of
alimentary canal not digested although the digestive enzymes
can
digest all the material that make cells? 14 Explain why the rate
of photosynthesis in plants is low both at low and high
temperatures? 15 Why is CO2 mostly transported in the dissolved
form in our blood than O2?
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16 Small intestine in the site for complete digestion of
carbohydrates, proteins and fats.
Write down the changes happen to the food in the small intestine
before its absorption. 17 Plants absorb water from the soil. How
does this water reach the tree tops? 18 Where does aerobic break
down of pyruvate take place in a living cell? What are the
end products? 19 Hydrochloric acid creates an acidic medium
which facilitate the action of protein digesting
enzyme in the stomach. Name the enzyme and give any three other
function served by the
acid. 20 Why is anaerobic respiration produce less energy
compared to aerobic respiration? 21 What is root pressure? 22 In
which direction does lymph flow? 23 Name the organ system which is
responsible for excretion and osmoregulation? 24 What is the
composition of lymph? 25 Differentiate between afferent and
efferent arterioles? 26 Name the vestigial part human alimentary
canal. 27 Name the respiratory pigment of blood in mammals. 28 How
does oxygen reach the cells in insects? 29 Respiration is a vital
process for all organisms. Explain. 30 What will happen if a
diaphragm of a person gets ruptured in an accident? 31 What is the
source of oxygen in photosynthesis? 32 How would non-secretion of
hydrochloric acid in our stomach affect food digestion? 33 Why does
leaf appear green? 34 What is the role of light in photosynthesis?
35 Write about the major glands associated with the alimentary
canal of man and mention
their functions. 36 How does the butter in your food get
digested and absorbed in the body and explain. 37 Why is the rate
of photosynthesis more during a bright sunny day as compared to a
cloud day? 38 If all the green plants are removed from the earth
life cannot be sustained. Comment. 39 Why is digestion essential
for living beings? 40 Draw a diagram to show the internal structure
of human heart. Label 6 part in all including
at least three valves
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Ch-7 Control and Coordination
1. A particular hormone requires Iodine for its synthesis. Name
the endocrine gland
which secretes this hormone and state it’s location in the human
body. 2. Write a term for chemical substance which brings about
control, coordination in plants? 3. What is the apical dominance?
4. Name the organ associated with the nervous system which is also
part of endocrine system
and secretes hormone. 5. Why are hormones called informational
molecules? 6. Why do leaves of “touch me not” plant droops when we
touch it? 7. Name the structural and functional unit of nervous
system. 8. What is the difference between the manner in which
movement in the sensitive plant
and movement in our legs takes place? 9. Why do people in the
mountainous regions get goitre? 10. What is a synaptic cleft? 11.
What are the scientific names for the following receptors in
humans? a. Receptors of smell b.
Receptors of taste 12. Which hormone is responsible for the
development of moustache and beard in men? 13. How do we detect the
smell of an agarbatti? 14. Why do stem and root show unilateral
growth towards light and gravity of earth respectively? 15. Which
part of the brain controls involuntary actions such as blood
pressure, salivation and
vomiting? 16. Justify that the pancreas and gonads perform dual
function. 17. Why are some patients of diabetes treated by giving
injections of insulin? 18. Pituitary gland is often called as
master gland. Why? 19. How can thyroid activity be determined in
man? 20. Do the plants have nervous plants like animals? If not,
how control and coordination
takes place in plants? 21. Nervous and hormonal systems together
perform the function of control and coordination
in human beings. Justify the statement 22. Which hormone is
released into blood when its sugar level rises? Name foe organ
which
produces the hormone and its effect on blood sugar level. Also
name one digestive
enzyme that this organ secretes and the function of this enzyme
23. Describe how auxins are related with foe bending of shoots
towards foe source of light.
Define nerve impulse. 24. Which structure in a neuron helps to
conduct a nerve impulse: Towards the cell
body. b..Away from foe cell body.
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Chemical Reactions and equations
1. Some crystals of copper sulphate were dissolved in water. The
colour of the
solution obtained would be
(a) green (b) red (c) blue (d) brown.
2.When dilute HCl is added to Zinc pieces taken in a test tube
a. No change takes place
b. the colour of the solution becomes yellow.
c. A pungent smelling gas gets liberated.
d. small bubbles of H2 gas appear on the surface of zinc
pieces
3. reacts with ozone and forms As per the balanced
equation, molecules of ozone required for every one molecule of
PbS is / are
(a) 4 (b) 3 (c) 2 (d)1
4. Chemically rust is
a. Hydrated ferrous oxide
b. hydrated ferric oxide
c. only ferric oxide
d. none of these
5. Which of the following reactions is not correct
(a) (b) (c) (d)
6. Identify the type of chemical reaction
(i) (ii)
7. Why does not silver evolve hydrogen on reacting with dil
8. Way do diamond and graphite, the two allotropic forms of
carbon evolve
different amounts of heat on combustion?
9. What is the sole of oxidizing agent is a reaction?
10. (a) Define Rusting
(b) Why do you apply paint an iron articles?
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11. White the balanced reactions for the following
i. Potassium Bromide (aq) + Barium iodide (aq) Potassium iodide
(aq) +
Barium Bromide(aq)
ii. Zinc carbonate (s) Zinc oxide (s) + carbon dioxide (g)
iii. Hydrogen (g) + chlorine (g) Hydrogen chloride
12. The reaction is given by i. White the ionic equation for the
reaction
ii. The ionic equations can be represented by two half
equations. Write these equations. iii. Explain why this is a redox
reaction
13. What are neutralization reactions? Why are they named so?
Give one example?
14. You are given with
(a) Iron Nails (b) solution (c) (d) Cu powder (e) Ferrous
sulphate crystal (f) Quick lime.
Make five reactions that can take place from these
materials.
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CLASS XII
ENGLISH
Q1. Do FIVE each in your BBC ( Remedial notebook)
(i) Notice (ii) Note-making
(iii) Unseen Passage (iv) Advertisements
Q2.Read the Editorial section of any English newspaper and write
your comments on it
Q3. Read at least 10 articles, speeches and debates on current
topics, read and write in your BBC
Q4.Listen to good English conversation and try to speak in
English with your
parents and friends.
Q.5. Read any book/novel of your choice.
Q6. Practice in BBC Following Lessons.
(i) My Mother at Sixty –six.
(ii) The Last Lesson
(iv) The Lost Spring (v) Deep Water (vi) The Third Level
(iv) The Tiger King
MATHS
Practice Real Numbers, Polynomial line, equation in 2 variable
quat equation in a separate note book.
Practice 10 questions from each chapter motioned above of R.S
agg. In a separate note book
PHYSICAL EDUCATION
(I) PRACTICAL FILE
(i) Draw a Athletics standard track(400 M) (ii) Pr.-1 Modified
AAHPER test for all items (iii) Pr.-2 Conduct Barrow three
items(Standing broad jump, Zig Zag Run &
Medicine Ball Put
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(iv) Pr.-3 procedure for asanas benefits and contraindication
for any two asanas each lifestyle disease.
(v) Pr.-4 Procedure for administering and all Senior Citizen
fitness test. (vi) Any one game ( Football, Basketball, Volleyball,
Hockey, Badminton, Unified
Basketball(for Divyang))
\\\\ \Revise chapter 1 to 4 for exam
ECONOMICS
Students will prepare economics project file on the basis of
standing instructions,
after consulting topic with teacher before holidays
Students will collect data on following topics
GOVT BUDGET,RURAL DEVELOPMENT,INFRASTRUCTURE CENTRAL BANK,
MONEY, EDUCATION SECTOR, HEALTH SECTOR, AGRICULTURE SECTOR,
GREEN REVOLUTION, NATIONAL INCOME SMALL INDUSTRIES ETC.
Students will prepare their projects independently
Student will prepare MCQ and short question of 1-4 chapters of
Indian
economic development and exercise of national bank numerical
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ACCOUNTANCY
1) PROJECT WORK--Make a comprehensive project based on class XI
for class
XII term examination. 2) REVISION WORK ----Revise the following
chapters for first unit test
a) Fundamentals of partnership. b) Valuation of good will and
change in profit sharing ratio. c) Admission of a partner. d)
Retirement/Death of a partner.
3) WRITING WORK----Do minimum 10 practical Questions on each of
the
above chapter in the home work note book. 4) SELF DOING
WORK-----Complete chapter Dissolution of partnership firms. 5)
Bring volume 2 company Account after summer break.
BUSINESS STUDIES
PART-A
(i) Learn all CBSE questions from l-1, L-2 and L-11
(ii) (ii) Practice HOTS question and case studies.
PART-B:
1. Prepare a practical file on any one topic given below: - (I)
Principles of Management- Henry Fayol’s principles
Or
- F.W.Taylor’s principles
2. Business Environment 3. Marketing Management 4. Stock
exchange (SEBI)
Note: - Follow guidelines of CBSE available on CBSE Website
Prepare and send soft copy of a short article over importance of
management as a career.
HINDI
|पढ़े हुए प िोां की पुनर िृठत कीठजए \
तीन सैंपि पेपरो क ठिखित अभ्य स कीठजए \
3.
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PHYSICS
Chapter: - electric field and charges
1. Show does the force between two point charges change if the
dielectric
constant of the medium in which they are kept increases.
2. A charged rod P attract rod R whereas P repel another charged
rod Q . what
type of the 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 from 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
10a. Find the
point on the line joining the two changes where electric field
is zero.
7 Define the term dipole moment P of an electric dipole
indicated its direction.
Write its S.I unit. An electric dipole is placed in a uniform
electric field E.
deduces the expression for the torque acting on it.
8. An electric dipole of length 4 cm when placed with its axis
making an angle
600 with the uniform electric field, experience a torque of 4√3
newton meter
calculate the PE of the dipole if it has charged + 4 newton
column.
9. (a)Use Gauss’ theorem to find the electric field due to a
uniformly charged
infinitely large plane thin sheet with surface charge density
σ.
(b)An infinitely large thin plane sheet has a uniform surface
charge density +σ.
Obtain the expression for the amount of work done in bringing a
point charge q
from infinity to a point , distance r, in front of the charge
plane sheet.
Chapter: - electric potential and capacitance
1. Why does the electric field inside a dielectric decreases
when it is placed
in an external electric field
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2. What is the work done in moving a 2μC point change from
corner A to corner B
of a square ABCD when a 10μC charge exist at the center of the
square? 3. Show mathematically that the potential at a point on the
equatorial line of an
electric dipole is zero? 4. A parallel plate capacitor with air
between the plates has a capacitance of 8pF .
what will be the capacitance if the distance between the plates
reduced by half
and the space between them is filled with a substance of
dielectric constant 6 ?
5. Prove that the energy stored in parallel plate capacitor is
given by 1/2CV2. 6. State gauss’s theorem in electrostatics? Using
this theorem define an
expression for the field intensity due to an infinite plane
sheet of charge density σ
C/m2?
7 (a) Define dielectric constant in terms of the capacitance of
a capacitor? On what
factor does, the capacitance of a parallel plate capacitor with
dielectric depends?
(b) Find the ratio of the potential differences that must be
applied across the
(i) Parallel
(ii) Series combination of two identical capacitors so that the
energy stored in
the two cases becomes the same.
8. A capacitor of 200 pF is charged by a 300 V battery. The
battery is then
disconnected and the charged capacitor is connected to another
uncharged
capacitor of 100 pF.Calculate the difference between the final
energy store in the
combined system and the initial energy store in the single
capacitor.
9. Show that the capacitance of a spherical conductor is 4πϵ0
times the radius of
a spherical conductor.
10. Find the ratio of the potential difference that must be
applied across the
parallel and the series combination of two identical capacitors,
so that the energy
stored in the two cases becomes the same.
Chapter: - current electricity
1. (a) What is the nature of path of free electrons in a
conductor in the (i) presence of
electric field (ii) absence of electric field. (b) Between two
successive collisions each free electron acquires a velocity from 0
to
V. What is the average velocity of a free electron in the
presence of an electric field?
Do all electrons have the same average velocity ? (c) How does
this average velocity of free electrons , is the presence of an
electric field vary with temp. ?
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2. Plot a graph showing the variation of current density (J)
versus the electric field (E)
for two conductors of different materials . what information
from this plot regarding the
properties of the conducting material, can be obtained which can
be used to select
suitable materials for use in making (i) standard resistance and
(ii) connecting wires
in electric circuit? 3. Drive an expression for drift velocity
of free electrons. Hence deduce ohm’s law .
4. Define relaxation time of the free electrons drifting in a
conductor. How is it related
to the drift velocity of free electrons? Use this relation to
deduce the expression for
the electrical resistivity of the material. 5. a uniform wire of
resistance 12Ὠ is cut into three pieces in the ratio 1:2:3 and
the
three pieces are connected to form a triangle , a cell of emf 8V
and internal
resistance 1Ὠ is connected across the highest of the three
resistors. Calculate
current through each part of the circuit. 1. Solve N.C.E.R.T
questions of chapter 1,2,3
2. Prepare an investigatory project on
(a) To study the different brands of cells available in the
market using
potentiometer & compare their EMF’s and internal
resistances.
(b) To study different types of capacitors and compare ordinary
capacitor with
super capacitor
6.(i) Why are the connection between the resistor in a meter
bridge made of thick copper strips? (ii) Why is it generally
preferred to obtain the balance point in the middle of the meter
bridge wire? (iii)Which material is used for the meter bridge wire
and why? 7.(i) State the working principal of a potentiometer .
with the help of circuit diagram ,Explain how a potentiometer is
used to compare the emf”s of two primary cell obtain the required
expression used for comparing the emf”s (ii)Write the possible
cause of one side deflection in a potentiometer experiment. 8(i)
State the Kirchhoff’s rule for an electric network. Using
Kirchhoff’s rules, Obtain the balance condition in terms of the
resistance of four arms of Wheatstone bridge. (ii)In the meter
bridge experiment setup.the nullpoint D is obtained at adistance of
40 cm from end A of the meter bridge wire. If a resistance of 10ᾨ
is connected in series with R1, null point is obtained at AD=60cm.
Calculate the value of R1 and R2.
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CHEMISTRY
Chapter: - SOLUTION
Q.1 What are the isotonic solutions?
Q.2 Define the term osmotic pressure?
Q.3 What is meant by reverse osmosis?
Q.4Define the following terms
(a) Isotonic Solutions
(b) Van’t Hoff Factor
Q.5 Define the term Van’t Hoff Factor Q.6 what is meant by
Colligative Properties?
Q.7 The molecular masses of polymers are determined by osmotic
pressure
method and not by measuring other collegiate properties give two
reasons. Q.8 Calculate the amount of KCI which must be added to 1
kg of water so that the
freezing point is depressed by2K
( Kf for water = 1.86 K kg mol-1)
Q.9 15.0 g of unknown molecular material is dissolved in 450 g
of water. The resulting
solution freezes at-0.34 O C of water. What is the molar mass of
the material? ( Kf for
water = 1.86 K kg mol-1) Q.11 Calculate the amount of sodium
chloride which must be added to one kilogram
of water so that the freezing point of water is depressed by 3K.
( Kf for water = 1.86 K
kg mol-1, atomic mass of Na=23, CI=35.5) Q.12 Calculate the
depression in freezing point of water when 20.0 g
of CH3CH2CHCICOOH is added to 500 g of water.
(Given, Ka=1.4X10-3, ( Kf for water = 1.86 K kg mol-1) Q.13
Define
(i) Mole Fraction (b) Molality (C) Raoult’s Law (ii) Assuming
complete dislocation, calculate the expected freezing point of a
solution
prepared by dissolving by 6.00 g of Glauber` salt Na2SO4 .10H2O
in 0.100 kg mol-1
(Kf for water = 1.86 K kg mol-1)
Atomic Masses Na= 23,S=32,O=16,H=1 Q.14 State Raoult’s law for a
solution containing volatile components Name
the solution which follows Raoult’s law at all concentrations
and temperature.
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(ii) Calculate the boiling point elevation for solution prepared
by adding 10g of CaCl2 to
200 g of water (Kb for water=0.52 K kg mol-1
, molar mass of CaCl2 = 111 g mol-1)
Or
Define the following terms
(a) Azeotrope (b) Osmotic Pressure (c) Colligative
Properties
Q.15 The Freezing point of a solution containing 0.2 g of acetic
acid in 20.0 g of
benzene is lowered by 0.45 o C Calculate
(i) The molar mass of acetic acid from this data (ii) van’t Hoff
Factor
(For Benzene Kf=5.12 K Kg mol-1)
What Conclusion can you draw from the value of van’t Hoff factor
obtained?
CHAPTER: ELECTRO CHEMISTRY
Q1 A copper-silver cell is set up the copper ion concentration
is 0.10 M. The
concentration of silver ion is not known. The cell potential
when measured was
0.422 V. Determine the Concentration of silver ions in the
cell.
[Given, E0 Ag+/Ag =+0.80v,
E0 Cu2+/Cu= +0.34V] Q-2 Express the relation between
conductivity and molar conductivity of a solution
held in a cell. Q.3 Express the relation among conductivity of a
solution in the cell, the cell
constant and the resistance of solution in the cell. Q.4 What is
meant by limiting molar conductivity?
Q.5 State kohlrausch’s law of independent migration of ions. Why
the conductivity of
a solution does decreases with dilution?
Q.6 The conductivity of 0.001 M acetic acid is 4X10-5 S/cm.
Calculate the dissociation
constant of acetic acid, if molar conductivity at infinite
dilution for acetic acid is 390 S
cm2/ mol.
Q-7 Calculate the emf for the given cell at 250 C.
Cr I Cr3+ (0.1M) II Fe2+ (0.01M)I Fe
[Given, E0 Cr 3+ /Cr =--0.74V,
E0Fe2+/ Fe =--0.44V,]
-
Q-8 The resistance of 0.01 M NaCl solution at 250 C. is 200 ohm
.The cell constant
of the conductivity cell used is unity. Calculate the molar
conductivity of the solution.
Q-9 The conductivity of a 0.20 M solution of KCI at 298 k is
0.0248 S cm – 1
Calculate its molar conductivity. Q-10 Define molar conductivity
of a substance and describe how for weak and
strong electrolytes, molar conductivity changes with
concentration of solute. How
is such change explained? Q-11State and explain kohlrausch’s law
of independent migration of ions. Write
an expression for the molar conductivity of acetic acid at
incite dilution according
to kohlrausch’s law.
Q-12 The electrical resistance of a column of 0.05 M Na0 H
solution of diameter 1
cm and length 50 cm is 5.55 X103 ohm. calculates its
resistivity, conductivity and
molar conductivity. Q-13 (i) Define the terms conductivity and
molar conductivity for the solution of an
electrolyte. Comment on their variation with temperature. (ii)
The measured resistance of a conductance cell was 100 ohm.
Calculate the specific conductance and Q-14 (i) Define the
following terms: (a) Molar conductivity (b) Secondary batteries (c)
Fuel cell (ii) State the following laws:
(a)Faraday’s first law of electrolysis
(b) kohlrausch’ s law of independent migration of ions Q-15
Calculate the emf of the cell in which the following reaction takes
place,
Ni (s)+2Ag+ (0.002 M) Ni2+(0.160 M)+2Ag(s)
[Given that, E0cell=1.05 V]
Q-16 The standard electrode potential for Daniell cell is 1.1 V.
Calculate standard
Gibbs energy for the cell reaction.
(F=96,500 C mol-1)
Q-17 What is primary cell? Give one example.
-
CHAPTER: Chemical Kinetics
Q.1 Define Order of a Reaction
Q.2 Define Rate of a Reaction Q.3 Why does the rate of a
reaction not remain constant throughout the reaction
process? Q.4 Write units of rate constants for zero order and
for the second order reaction.
If the concentration is expressed in Mol-1 and time in
seconds.
Q.5 Write two differences between order of reaction and
molecularity of reaction.
Q.6 Define
(i) Order of Reaction (II) Elementary step in a reaction.
Q.7 A reaction is of second order with respect to a reactant.
How is its rate affected
if the concentration of the reactants is (i) Doubled (ii)
Reduced to half?
Q.8 A reaction is of second order with respect to a reactant.
How is the rate of
reaction affected, if the concentration of the reactant is
reduced to half? What is the
unit of rate constant for such a reaction? Q.9 Explain the
following terms
(i) Rate determining step of reaction (ii) Molecularity of a
reaction
Q.10 Discuss any four factors which affect the rate of a
chemical reaction?
Q.11 Define the following
(i) Elementary step in a reaction (ii) Rate of a Reaction
Q.12 A first order reaction is found to have a rate constant,
k=5.5X10-14 s-1 finds
the half of the reaction
Q.13 If half-life period of a first order same reaction is x and
3/4t Q.14 Define the Following Terms
(i) Half- life of reaction (t ½ ) (ii) Rate Constant (k)
Q.15 Define half-life of reaction Write the expression on
half-life for
(i) zero order reaction (ii) First Order reaction
SURFACE CHEMISTRY
-
VSA QUESTIONS (1 - MARK QUESTIONS) Concept Based
1. Why does a gas mixed with another gas not form a colloidal
system?
2. Why are adsorbate particles attracted and retained on the
surface of
adsorbent?
3. Explain the terms sorption and desorption. 4. “Chemisorption
is highly specific.” Illustrate with an example. 5. “Adsorbents in
finely divided form are more effective.” Why? 6. Name two compounds
used as adsorbent for controlling humidity. 7. Mention one shape
selective catalyst used to convert alcohol directly
into gasoline.
8. ‘Generally high temperature is favourable for chemisorption.’
Why? 9. Name the catalyst used in the following process :
(a) Haber’s process for the manufacture of NH3 gas.
(b) Ostwald process for the manufacture of nitric acid.
10. Explain the relationship given by Freundlich in adsorption
isotherm.
11. Which group elements show maximum catalytic activity for
hydrogenation reactions?
[Hint : 7–9 group elements]
12. Why gas masks are used by miners in coal mines while
working?
13. Write the chemical reaction involved in the preparation of
sulphur sol.
14. Name the enzyme which converts milk into curd.
15. What are the optimum temperature and pH at which enzymes are
highly active.
16. What are the physical states of dispersed phase and
dispersion medium
in foam rubber. 17.What is the composition of colloidion
solution?
18. Why do colloidal particles show Brownian movement?
[Hint : Due to unbalanced bombardment of the particles by
the
molecules of the dispersion medium] 19.State the sign of entropy
change involved when the molecules of a
substances get adsorbed on a solid surface. 20.Why does sky
appear blue to us? 21.What happens when hydrated ferric oxide and
As2O3 sols are
mixed in almost equal proportions?
22. Gelatin is generally added to ice-cream. Why?
[Hint : Ice-cream is water in oil type emulsion and gelatin acts
as emulsifier].
23. How is lake test for aluminium ion based upon
adsorption?
[Hint : Al2O3.xH2O has the capacity to adsorb the colour of blue
litmus
from the solution]
24. What is saturation pressure in Freundlich’s isotherm?
-
25. Mention the two conditions for the formation of
micelles.
[Hint. : CMC and Tk]
26. How is Brownian movement responsible for the stability of
sols?
[Hint : Stirring effect due to Brownian movement does not allow
the
particles to settle down.]
27. Which of the following is more effective in coagulating
positively charged
hydrated ferric oxide sol : (i) KCl (ii) CaSO4 (iii) K3
[Fe(CN)6].
28. State the purpose of impregnating the filter paper with
colloidion solution.
29. Mention one use of ZSM–5 catalyst.
SA (I) TYPE QUESTIONS (2 - MARK QUESTIONS) 30.Explain the effect
of temperature on the extent of physical and chemical
adso. 31.Define the term peptization and mention its cause.
32.Write the factors upon which the catalytic reaction of
shape-selective catalyst depends?
[Hint : (a) Pore structure of the catalyst; (b) Size and shape
of the
reactant and product molecules.] 33.Mention two examples of
emulsifying agents for o/w and w/o emulsions. 34.Suggest a
mechanism of enzyme catalysed reaction.
35.A small amount of silica gel and a small amount of anhydrous
calcium
chloride are placed separately in two beakers containing water
vapour. Name
of phenomenon that takes place in both the beakers.
[Hint : Silica gel – Adsorption, Anhydrous CaCl2–Absorption, as
it forms
CaCl2. 2H2O) 36.Write the differences between adsorption and
absorption? 37.How can physisorption be distinguished from
chemisorption? 38.In what way these are different : (a) a sol and a
gel (b) a gel and an emulsion. 39.State “Hardy Schulze Rule” with
one example. 40.What is an emulsifying agent? What role does it
play in forming an emulsion? 41.Define the terms :
(a) Helmholtz electrical double layer.
(b) Zeta potential.
42.A graph between m and log p is a straight line at an angle of
45° with intercept on the y-axis i.e. (log k) equal to 0.3010.
Calculate the amount
of the gas absorbed per gram of the adsorbent under a pressure
of 0.5
atmosphere.
43.Mention the two necessary conditions for the observation of
Tyndall Effect. 44.Account for the following :
(a) Artificial rain can be caused by spraying electrified sand
on the
clouds.
-
(b) Electrical precipitation of smoke. 45.Write chemical
equations for the preparation of sols :
(c) Gold sol by reduction.
(d) hydrated ferric oxide sol by hydrolysis. 46.How can the two
emulsions can be distinguished :
(e) oil in water type (O/W) and
(f) water in oil type (W/O)
SA (II) TYPE QUESTIONS (3 - MARK QUESTIONS) 47.Write the
difference between
(a) catalysts and enzymes
(b) promoters and poisons 48.Write the steps of ‘Modern
Adsorption Theory of Heterogeneous Catalysis.’
49.Mention the two important features of solid catalysts and
explain
with the help of suitable examples.
50.How are the following colloids different from each other
in
respect of dispersion medium and dispersed phase? Give one
example of each type.
(a) An aerosol (b) A hydrosol (c) An emulsion. 51.What happens
:
(a) by persistent dialysis of a sol.
(b) when river water meets the sea water.
(c) when alum is applied on cuts during bleeding.
52.Distinguish between multi molecular, macromolecular and
associated colloids with the help of one example of each.
BIOLOGY
Learn and write 2 & 3 marks questions of previous year board
of Unit 1,2,3,4 from exam idea. Practice all the diagrams of unit 1
to 4. Do the assignment in remedial notebook.
Read the chapter from ncert book.
-
PSYCHOLOGY
1. Practical file work : case profile
2. Using the following steps;
3. Introduction: a brief introduction about problem
4. Identification data; name, diagnosed problem, voluntary
5. Case history: personal info; information about social
economic status;
information about father, mother, siblings, birth order, house
type, number of
family members etc.
6. Information about physical health
7. Any professional help taken
8. Recording signs
9. Concluding comments
10. Watch any film or read a book depicting a psychological
disorder/learning
and write your experience 11. Recommended movies: 12. Kartik
calling kartik 13. My name is khan 14. Taree zameen par
-
HOME SCIENCE
1. Identify the problems of adjustments of adolescents. 2. Spend
a day with an aged person and observe the needs and problems.
Write a report. 3. List and discuss 4 or 5 areas of agreement
and disagreement of self with
mother, father, siblings, friends and teachers. 4. To make
samples of hemming, backstitch and interlocking. 5. To make button
hole and to sew a hook, eye and button. 6. Collect labels of ISI,
Agmark and FPO standard marks. 7. Write and learn the extra
questions given (chapter wise). 8. Revise the syllabus completed so
far.
POLITICAL SCIENCE
Class XII
Q1 Write the answers from Assignment Practice Cartoons and
images discussed
in class.
Q2 Make a project File on the topics given in class i,e .
Venezuela problem, Kashmir problem, indo –Pak relations,
Globalization, Korea war, kargil war, European union, Us hegemony
in World, Global Warming,9/11 and global war on terror , The rise
of the Chinese economy, UNO ,Israel problem, Role of World
Bank,IMF, IAEA, Amenesty ,Human Rights Watch,. SAARC, and ASEAN …
Parameter Count for Project File are:
, b) Presentation c) Content d)
Q3 Practice Map work from book chapter 1 to 8 done in a class. Q
4 prepare PPT on the topic :
a) Korea war b) Vietnam war c) Kashmir problem ; article 370,
35- A d) Brexit
a) Brexit
b) Non Align Movement current information
d) Tibet problem e) Regional Aspiration in India f) Emergency in
India ( causes and consequences )
-
g) Relationship between India and Pakistan . h) Global Warming
causes and consequences. i) Globalisation ( advantages and
disadvantages ) j) Consequences of partition of India
COMPUTER SCIENCE
Unit 1:
(i)Write and learn all CBSE questions from unit 1
(ii)Practice questions of finding the output, Errors Handling
and named the
header file of library function. solved question (10 set) like
given question below
1. Write the output from the following code:
a) x = 10 y = 20 if (x>y):
print x+y
else: print x-y
b) print "Inspirational stories \n for \t Children"
c) s = 0 for i in range(10,2,-2):
s+=i print "sum= ",s
d) n = 50
i = 5
s = 0
while i
-
print i
i + =20
b) for b in (1,10):
print b d) i = 4
while (i>=4):
print i+ = 10
c) i=2
while (i100000 15% 8%
50000 10% 5%
-
16. Write a program to input two complex numbers and to find sum
of the given complex numbers.
17. Write a program to input two complex numbers and to
implement multiplication of the given complex numbers.
18. Write a program to find sum of two distances with feet and
inches.
19. Write a program to find difference between two times with
hours, minutes and seconds.
20. Write a program to find the sum of all digits of the given
number.
21. Write a program to find the reverse of that number.
22. Write a program to input username and password and to check
whether the given username and password are correct or not.
23. Which string method is used to implement the following:
a) To count the number of characters in the string.
b) To change the first character of the string in capital
letter. c) To check whether given character is letter or a
number.
d) To change lower case to upper case letter.
e) Change one character into another character.
24. Write a program to input any string and to find number of
words in the string.
25. Write a program to input any two strings and to check
whether given strings are equal are not.
26. Differentiate between tuple and list.
27. Write a program to input n numbers and to insert any number
in a particular position.
-
INFORMATION PRACTICE
1. Write the output from the following code:
a) x = 10 y = 20 if (x>y):
print x+y
else: print x-y
b) print "Inspirational stories \n for \t Children"
c) s = 0 for i in range(10,2,-2):
s+=i print "sum= ",s
d) n = 50
i = 5
s = 0
while i
-
c) i=2
while (i100000 15% 8%
50000 10% 5%
-
19. Write a program to find difference between two times with
hours, minutes and seconds.
20. Write a program to find the sum of all digits of the given
number.
21. Write a program to find the reverse of that number.
22. Write a program to input username and password and to check
whether the given username and password are correct or not.
23. Which string method is used to implement the following:
a) To count the number of characters in the string.
b) To change the first character of the string in capital
letter. c) To check whether given character is letter or a
number.
d) To change lower case to upper case letter.
e) Change one character into another character.
24. Write a program to input any string and to find number of
words in the string.
25. Write a program to input any two strings and to check
whether given strings are equal are not.
26. Differentiate between tuple and list.
27. Write a program to input n numbers and to insert any number
in a particular position.
PAINTING
Preparation of paintings required for portfolio for cbse final
practicals
MATERIAL REQUIRED:
1. Half imperial size cartage sheet.
2. Oil Pastel colors and Water colors.
1. STILL LIFE (Pots with fruits)………………….. 2 Paintings
One in pencil
One in color (Water or Oil pastel color) 2.
LANDSCAPES…………………………………………..2
Paintings. One in color
One in black and white ( with black gel pen) 3. STUDY OF
FLOWERS…………………………………2 Paintings in color. 4. STUDY OF FRUITS &
VEGETABLES……………..2 Paintings ( one each in color) 5. GEOMETRICAL
DESIGNS COMPOSITION……2 Paintings.
One in color
One in black & white.
TOTAL NO. OF PAINTINGS…………10.