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.

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

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.

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.

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

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.

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

.

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?

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?

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

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.

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?

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.

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

(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

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.

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

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. ?

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.

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.

(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.