Class 6th

English L.1 WHO DID PATRICK’S HOMEWORK?1. Why did Patrick dislike his homework?2. Whom did Patrick save from the cat?3. What do you mean by the word ‘glitch’?4. Why were Patrick’s teachers happy?5. Write the past form of the verb ‘promise’. L.2 HOW THE DOG FOUND HIMSELF A NEW MASTER!1. During those early days, the dogs were their own ……………………2. The wolf was afraid of ………………..3. The bear was afraid of ………………….4. The lion was afraid of …………………….5. The dogs were tamed by ………………… L.3 TARO’S REWARD1. Where did Taro live?2. What did he do to earn his livelihood?3. What did his father long for?4. Taro heard the sound of …………………….5. The emperor of Japan rewarded Taro with …………………. L. 4 AN INDIAN WOMAN IN SPACE: KALPANA CHAWLA1. In which subject did Kalpana earn her Ph.D?2. Going to U.S. for a master‘s degree was not liked by her ……………………3. She was selected at NASA for the training in ………………4. The period of her first mission in space was of……………………………………5. What do you mean by encyclopaedic knowledge?

L.5 A DIFFERENT KIND OF SCHOOL1. Who is the writer of this lesson?2. Who was Miss Beam?3. What was the real aim of Miss Beam’s school?4. What do you mean by the word ‘plump’?5. Children were made to share the ………………. POEM 1 A HOUSE A HOME

1. Brick, stone, wood etc. are required to make a ……………..2. What is a home?3. What do you mean by the word ‘stucco’?4. Name the poet.5. Give the opposite of ‘kind’

POEM 2 THE KITE

1. What looks bright on the blue?2. The kite is compared with ………………3. The kite dives and dips in ……………4. In this poem, what do you mean by ‘blue’?5. Name the poet.

POEM 3 THE QUARREL1. It seems that the brothers quarreled on a …………………..2. The phrase ‘fell out’ means …………………..3. In this poem , those who hated one another were …………………4. The start was slight but ……………………..5. ‘Slight’ means ………………

POEM 4 BEAUTY1. The poem has been composed by ……………….2. Why are people dancing?3. Beauty can be seen in ……………………………4. Beauty is heard …………………………..5. What is meant by ‘chanting’?

POEM 5 WHERE DO ALL THE TEACHERS GO?

1. The poem is about what a child wants to know about …………………….2. The speaker finds it difficult to believe that his teachers are ………………….3. Name the poet.4. What do you mean by “hymn books’?5. Where do normal people go after work?

SUPPLEMENTARY READERL.1 A TALE OF TWO BIRDS

1. Where do the two new born babies live? 2. What happened one day? 3. What happened to their mother? 4. Where did the first bird land? 5. Where did the second bird land?

L 2 THE FRIENDLY MONGOOSE1. What did the farmer bring one day?2. The farmer’s wife did not trust …………………………3. Where did the farmer’s wife go one day?4. Who was sleeping in the cradle?5. Who hit the mongoose with heavy basket?

L 3 THE SHEPHERD’S TREASURE1. The shepherd was the illiterate man because…………………2. The shepherd was known for his …………………3. Who appointed the shepherd as the governor?4. Who were jealous of him?5. What did the shepherd call his old blanket?

L. 4 THE OLD CLOCK SHOP 1. Who was Mr. Ray? 2. Who were two visitors? 3. The mode of communication was …………………… 4. Christmas Eve falls on ……………………… 5. The two visitors were lucky to get ………………..

L.5 TANSEN1. Tansen imitated the voices of ………………………..2. Tansen became a good singer after ……………………

3. Swami Haridas was …………………………….4. Who sang raga Deepak?5. Who sang the rage Megh?

Class 6th

Hindi

Class 6th

Sanskrit

Class 6th

SST 10 questions each from History geography and CivicsDraw the diagram of:-Major Latitudes and heat zones, Cardinal directionsMap work:-On the political map of India locate the following places:-a)Burzahom, b)hunsgi,c)Inamgaon, d)Kurnool caves, e)Bhimbetkaf)Mehergarh, g)Daojali hading

Class 6th

Science 1. To make the tables on the following topics:A) Tables 2.3 deficiency diseases and causes.B) Tables 8.1 types of locomotion.C) Table 7.3 observation of flowers.D) Table 4.3 dissolving solvents.E) Table 2.2 nutrients in food.

Class 6th

Maths CHAPTER EX. QUESTIONS1 1.1 1,2

1.2 1,3,5,7,8,92 2.1 1,2,4,5,7

2.2 1,2,3,42.3 3,4,5

3 3.1 1,2,43.2 1,4,5,8,93.3 1,3,5,63.5 1,3,6,7,8,93.7 1,2,4,,6

4 4.1 1,2,34.2 1,2,34.3 1,24.5 1,2

5 5.1 1,2,3,45.2 1,2,35.3 15.4 1,3,4,5,65.6 1,25.7 1,25.8 1,2,3

6 6.1 1,2,3,46.2 1,2,36.3 1,2

7 7.1 1,2,57.2 1,27.3 1,2,57.6 1,2,5

8 8.1 1,2,58.2 1,2,3,4

8.3 18.4 1,2,38.5 1,2,3,48.6 1,2,3,.4

Class 7th

English L. 1 THREE QUESTIONS1. Name the author of the story,’ Three Questions’.2. What three things the king want to know?3. Why did the king want to know the three things?4. Why did the king go to the wood?5. Who came running towards the hut? L.2 A GIFT OF CHAPPALS1. Name the author of the story, ‘A Gift Of Chappals’.2. Who was Mridu?3. Why did Ravi take Mridu to the backyard?4. Why was the news of kitten kept a secret?5. How did Ravi help the beggar?

L.3 GOPAL AND THE HILSA FISH1. Why was the king fed up?2. Which challenge of the king did Gopal accept?3. What did the people think about Gopal?4. Why did the king call the mad man inside the palace?5. How did Gopal take off people’s attention from the hilsa fish?

L. 4 THE ASHES THAT MADE TREE BLOOM1. why did the old couple love their pet so dearly?2. who made the poor farmer rich?3. how many times did the spirit of the dog help the master?4.who does the daimio refer to ?5. why did the wicked neighbor kill the dog?

L.5 QUALITY1. Name the author of the lesson,’Quality’.2. Where was Gessler’s shop located?3. How did the author feel as he entered Gessler’s shop?4. Why did the author visit the shop so frequently?5. What did Mr. Gessler die of? L. 6 EXPERT DETECTIVES1. Name the writer of the story ,Expert Detectives’.2. Why was Nishad called ‘Seven’?3. Where did Mr. Nath live?4. What is strange about Mr. Nath’s Sundays?5. Who do you think Mr. Nath is? POEM 1 THE SQUIRREL

1. Name the poet of the poem, ‘The Squirrel’.2. How does the tail of squirrel look like?3. Whom does the squirrel tease?4. Is the squirrel a wild or domestic animal?5. How does the squirrel tease the viewers?

POEM 2 THE REBEL

1. Name the poet of the poem, ‘The Rebel’.2. Who is a rebel?3. Would you like to praise the rebel’s ways of life?4. How does a rebel help us?5. What message does the poet convey through this poem? POEM 3 THE SHED1. Name the poet of the poem, ‘The Shed’.2. Where is the shed?3. Why do the hinges of the door creak?4. What is the shed used for?5. What does the word ‘hinges’ mean?

POEM 4 CHIVVY1. Name the poet of the poem,”Chivvy”.2. What is chivvy?3. What do the grown-ups normally say if the child speaks loudly?4. When are the grown-ups considered wrong?5. How should the grown –ups deal with the children?

POEM 5 TREES1. Name the poet of the poem, ‘trees’.2. How are the trees useful for the children?3. How are the trees useful for the birds?4. Why do mother like trees?5. How do trees help human beings in various ways?

L.1 THE TINY TEACHER1. What is an anthill?

2. How do ants greet each other? 3. How does an ant differ from other insects or worms? 4. How are grubs looked after? 5. What is a greenfly? L. 2 BRINGING UP KARI 1. When does Kari come to the narrator? 2. How did the narrator clean Kari’s body? 3. What were the commands leant by Kari?4. Why did Kari steal bananas?5. How did Kari save the boy at the bottom of the river?

L. 3 THE DESERT1. What is the common feature of all deserts?2. What is an oasis? 3. What are sand dunes? 4. How do the cactus plants survive in the desert? 5. Are the deserts useless? L.5 THE COP AND THE ANTHEM1. What were Soapy’s hopes for the winter? 2. Soapy’s first plan was ………………………………….3. Soapy visited the prison ………………………………. 4. Why did the head waiter of a restaurant not let Soapy in?5. Did the cop arrest Soapy at the end of the story?

Class 7th

Hindi

Class 7th

Sanskrit

Class 7th

SST 10 questions each from History geography and CivicsDraw the diagram of:-Water cycle,Layers of atmosphere,Interior of the earth

Class 7th

Science 1. Any two natural disaster and its management.2. Difference between types of soil.3. Write characteristic of one animal or bird of:A) Tropical rain forest region.B) Polar region.

Class 7th

Maths

Class 8th

English1. What did the author find in a junk shop?2. What was the condition of the desk?3. What did the author find in the small black tin box?4. What did Hans Wolf do as a civilian?5. What did Macpherson do as a civilian?6. Who are ‘Fritz’ and ‘Tommy’ in the story?7. What happened on January 25, 1915?8. Who was Ignesious?9. What did Ignesious do after waking up?10. How was Meghna saved?11. What is a tsunami?12. Name three prime ministers of Independent India.13. Name two things that helped the British to extend their power in 18th

century in India.14. Name three absurd practices which the religious leaders preached in the

latter half of the 17th century?15.What was the first requirement of the society according to Ram Mohan Roy?

16) Which regulation was passed in 1818 to oppress the Indians?17) What important change did Lord Macaulay bring in the education in India?18) What was the state of Indian industry about 1929?19) How did the British Officers loot India?20) What did Ram Mohan Roy like about the western ways?21) What is the poem ‘Macavity The Mystery Cat’ about?22) What is the other name of Macavity?23) What is the quality of a master criminal?24) How is Macavity’s body built up?25) Is Macavity neat and clean? Describe.26) Where would Bepin Choudhary go every Monday & Why?27) What sort of social habits did Bepin Choudhary have?28) Who was Chunilal?29 Why do you think the man did not accept the King’s Offer?30) What was the King’s Offer?31. What does a child like on a summer morning?32. How do the children spend their day at school?33. What is a kill-joy for the children?34. How does the child react to the teaching at school?35. Name the poet of the poem “The School Boy”.

36. What had happened to Jody’s Father?37. How did the doe save Penny’s life?38. Why does Jody want to bring the fawn home?39. How does Jody know that the fawn is a male?40. What helped Jody to know the directions in the forest?41. Write down some examples of the natural resources that we use.42. Penny said to Jody,“Will you be back before dinner?” Change it into indirect speech.43. Why was Mill-Wheel afraid to leave Jody alone?44. How did the deer drink milk from the gourd?45. The buzzard is . 46. What was the overpowering feeling when Major Ahluwalia set his foot on Everest?47. Write the noun form of – Endure Signify

Maintain PersistConfide Abhor

48. Why do people climb mountain?49. Why do people prefer only Mount Everest?50. Why does the poet call the cricket in the poem ‘silly’?51. What was the state of the cricket’s home?52. What was the state of the weather?53. What did the cricket do when he began to starve?54. The miserly ant spoke of a principle. What is it?55. What did the cricket do during summer and spring? Why?56. What did the man ask the three animals to do at the end of the day?57. How did the animals react to man about working double –time?58. Why did the camel live in the middle of the desert?59. What made the dog, the horse, and the ox very angry?60. How did the Djinn know the horse was complaining against the camel?61. How did Velu react when he reached at Chennai Central?

62. How did Velu meet Jaya?

63. Why had Velu run away from home?

64. What food did Velu Jaya get from the garbage dustbin?

65. What was Buckingham Canal?

66. Why did Velu decide to be a ragpicker?

67. Name the author of “The Selfish Giant”?

68. Why is the Giant called selfish?

69. Why did the children love the Giant’s garden?

70. Where had the giant gone for seven years?

71. How Giant find the song of the linnet?

72. What was the terrible nightmare of Hafeez contractor as a student?

73. Why did Hafeez go to an architect’s office for leaving French?

74. What did Hafeez do as a gang leader?

75. Why couldn’t Hafeez join the army?Class 8th

Hindi

Class 8th

Sanskrit

Class 8th

SST Definitions -1x5=5Short answer questions:-3x3=9Long answer question:-5x1=5From all chapters.Map work:-On the outline map of India locate the main centres of revolt of 1857

Class 8th

Science

Class 8th

Maths CHAPTER EX. QUESTIONS1 1.1 1,2,6,7,8,11

1.2 ,3,5,7,2 2.1 4,6,7,8,12

2.2 1,4,7,8,11,14,152.4 1,72.6 6,7

3 3.2 23.3 2,5,8,123.4 1,6

4 4.1 1,4.2 1,4.3 1,(3)4.4 14.5 1,4

5 5.1 ,3,55.2 1,2,4,55.3 1,2,3

6 6.1 5,6,7,8,96.2 1,6.3 3,8,9,106.4 1,2,6,7,8,9

7 7.1 2,3,47.2 1,3

8 8.1 5,68.2 1,2,6,7,8.3 1,4,5,10,11,12

Class 9th

English SOLVE THE TWO SAMPLE PAPERS GIVEN IN THE WORKBOOK.

Class 9th

Hindi

Class 9th

Sanskrit

Class 9th

SST Assignment no-1:- 1 Mark Question-1x5= 53 Marks Question-3x3=9

5 Marks Question-5x1=5From History, Geography, Civics, Economics. (To be done from all chapters )2. Map work:-1. On the outline map of India, locate the following:-

a) Standard Meridianb) All plateaus, mountain peaks, coasts.c) Length and breadth, longitude and latitude.

2. On the outline map of world locate 10 countries related to Nazi and French revolution.

Class 9th

Science 1. To complete the notes of experiments.2. To write 20 practical based questions along with their answers.3. To solve the model sample paper of science for periodic test 2.

Class 9th

Maths

Class 10th

English CHILDREN WILL COMPLETE THE NOVEL SUMMARY AND THE NOTES OF THE LESSONS COMING IN THE HALF-YEARLY EXAM. NOTEBOOK TO BE SUBMITTED IMMEDIATELY AFTER THE ENG. EXAM IS OVER. SOLVE ONE SAMPLE PAPER ALSO.

Class 10th

Hindi

Class 10th

Sanskrit

Class 10th

SST Assignment no-1:- 1 Mark Question-1x5=53 Marks Question-3x3=95 Marks Question-5x1=5

From each chapter.Map work:-1. On the outline map of India mark types of soils in India.2. Dams3 . Food crops-rice,wheat4. Beverages and plantation crops- tea and coffee5. Fibre crops6. Minerals7. Nuclear stations.

Class 10th

Science 1. To solve the model sample paper of science for periodic test 2.2. To complete the notes of experiments and solve practical based questions.3. Draw the label diagram of hydrotropic movement, phototropic movement, fertilisation in plants, male and female reproductive system, types of asexual reproduction in organisms, nephron, nerve cell.

Class 10th

Maths

Class

English

11th

Class 11th

Hindi

Class 11th

Physics

Class 11th

Chemistry Answer following question as per their marking: Short Answer Questions (1 Mark each)

1. Which law of chemical combination may be violated by an unbalanced chemical equation

2. What is period no. and group no. for the element with atomic no.32

3. Draw lewis dot structure for CO2—

4. The size of weather balloon becomes larger as it goes up in the sky. Why

5. Distinguish between molar mass and molecular masas

Short Answer Questions (2 Mark each)6. If the density of methanol is 0.793g/cm3 , what is the volume

neede for making 2.5L of its 0.25 M solution. (molar mass of methanol is 32gm/mole)

7. What is Hunds rule of multiplicity. Explain it by taking example of N

8. A) write two differences between orbit and orbitalB) write electronic configuration of Cu(at.no.29)

9. Arrange the following in increasing order : A) F- Na+, O2- Al3+

B) Mg k B Al 10. What is meant by limiting reagent . identify the limiting reagent

when 3g of H2 reacts with 29 g of O2 to yield H2OShort Answer Questions (3 Mark each)

11.Calculate the wavelength of photon emitted when an electron in Bohrs orbit, n==2 returns to n=1 in hydrogen atom.

12. if photon off wavelength 15 pm strikes on an atom and one of its inner bound electron is ejected out with a velocity of 1.5x107 m/s, calculate the energy with which it is bound to the nucleus.

13. Explain the significance of following; A) principal quantum no. B) azimuthal quantum no. C) magnetic quantum no.14. Give reason why; A) ionisation enthalpy of N is greater than O B) Electron gain enthalpy of F is less negative than Cl C) cations are smaller than that of their parent atom15. Geometries of NH3 and H2O molecules are distorted tetrahedral .

why16. Describe bond angle shape and hybridisation in PCl5

17. Drive ideal gas equation

18. calculate the total pressure in a mixture of 8 g of di oxygen and 4 g of dihydrogen confined in a vessel of 1 l. (R= 0.083bar L/K /Mole

Long Answer Questions (5 Mark each)19. Give MO diagram of N2 and O2

+. Give their bond order and magnetic behaviour

20. A) what is hydrogen bonding. H2O is liquid where as H2S is gas. Why

B) explain why CCl4 has zero dipole moment although C-CL bonds are polar.

Class 11th

Biology

Class 11th

Maths

Class 11th

CS [1]Write differences between logical errors and syntax errors. [2M][2]What do you mean by robustness of a program. [2M][3]What is guard code. [1M][4]What is the process of translation of the algorithm ,into a program,called? [1M][5] What are the characteristics of a good program ? [2M][6] Name two types of compilation errors ? [2M][7]Name the header files to which the following belongs to : (i) getch( ) (ii) isdigit( ) (iii) sqrt( ) (iv) atoi( ) [2M][8] Write difference between keyword and identifier. [2M][9] Write a program in c++ to print Fibonacci series:- 3 0,1,1,2,3,5,8 …………….[10] Write a program in c++ to find out factorial of a given no. 3[11]Write a program in c++ to replace every space in a string with hyphen. [2M][12] Convert the following into its binary equivalent codes. 4 (i) (84)10 = (?)2

(ii) (2C9)16 = (?)10

(iii)(101010)2 = (?)10

(iv) (3674)8 = (?)2

Class 11th

IP

Class 11th

ACCOUNTANCY 1. Solve Illustration 7 to 11 from chapter Depreciation.

Class 11th

BUSINESS STUDIES 1. Answer 2 short questions from each

chapter (Ch 1 to 6)

Class 11th

Economics

Class 12th

English

Class 12th

Hindi

Class 12th

Physics

Class 12th

Chemistry

CHAPTER 1 THE SOLID STATEHow does amorphous silica differ from quartz?How can a material be made amorphous?Define end centered cubic unit cell?How many atoms can be assigned to its unit cell in an element from(i) body centered cubic cell (ii) face centered cubic cellIn calcium fluoride crystal Calcium ion present in fcc arrangement. Calculate the number of fluoride ions?A cubic solid made of two elements X and Y. Atom Y are at the corners of the cube and X at the body centre .What is the formula of the compound?What is the co-ordination number of an octahedral voids?Why is Frenkel defect found in AgCl?On heating crystals of KCl in Potassium vapour the crystal start exhibiting a violet colour. Why?Name one solid in which both Schottky and Frenkel defect occurs.Calcium Chloride will produce Schottky defect if added to AgBr crystal. Explain.What is doping? Why is it done?What is the difference in the semiconductor obtained by doping silicon with aluminum or with phosphorus?Why does the window glass of the old building look milky?What are 13-15 or 12-16 compounds?Account for the following---Silicon is an insulator but silicon dope with acts as a semiconductor Why does the conductivity of metals decreases with rise of temperatureOn Corundum oxide ions are arranged in hexagonal close packing and aluminum ions occupy 2/3 of the octahedral voids. What is the formula of corundum?ZnO is white but it turns yellow on heating. Explain.Sodium has bcc structure but nearest neighbour distance 365.9 pm calculate its density?Niobium crystallizes in bcc structure. If its density is 8.55 g/cu cm Calculate atomic radius of niobium? Given at. Mass of niobium is 92.9u

CHAPTER 2 THE SOLUTIONSGive an example of solution containing a solid solute in solid

solvent.How does the molarity of a solution changes with the temperature?Oil and water do not mix,why?Why is liquid ammonia bottle first cooled before opening?Cutting onions taken from the freeze is more comfortable than cutting onions lying at room temperature. Explain why?Two liquids A & B on mixing produce a warm solution. Which type of deviation from Raoult’s Law?Why is boiling point of water increased on addition NaCl in it?Why it is advised to add ethylene glycol to water in a car radiator while driving in a hill station?What will happen red blood cells are placed in water?Give one example of each of miscible liquids pairs showing positive and negative deviations from Raoult’s Law.Under what conditions Van’t Hoff factor is (i) equal to one (ii) Greater than one (iii) less than one Explain your answer.Why a person suffering from high blood pressure is advised to take minimum quantity of common salt?What is osmotic pressure and how is it related with molecular mass of a non-volatile substance?What advantage the osmotic pressure method has over the elevation of boiling point method for determining molecular masses.Calculate the value of van’t Hoff factor if K4[Fe(CN)6] 25% dissociates in aqueous solution?Why is the vapour pressure of the solution of glucose in water lower than that of water?A solution is made by dissolving 30 g of non-volatile solute in 90 g of water. It has vapour pressure of 2.8 kPa at 298 K. The vapour pressure of pure water is 3.6 kPa. Calculate molar mass of solute.Calculate the molality of a sulphuric acid solution in which the mole fraction of water is 0.85 .Calculate the boiling point of a solution containing 0.61 g of benzoic acid in 50 g of carbon disulphide. Assuming 84% dimerisation of acid. The boiling point of and Kb to CS2 are 46.2oC and 2.3 Kkg/mol respectively.Calculate the mole fraction of ethylene glycol (C2H6O2 )in a solution containing 20% ethylene glycol by mass.

CHAPTER 3 ELECTROCHEMISTRYExpress mathematical relationship among the resistance, specific conductivity constant.What is the relationship between molar conductivity of an electrolyte to its degree of dissociation?What is the necessity to use a salt bridge in a Galvanic cell?State the factors that influence the value of cell potential of the cellMg(s)|Mg+2(aq)|| Ag+(aq)|Ag(s)Write Nernst equation for the general cell reaction aA +bB === cC + dDWhat is the relationship between free energy change and emf of the cell?Why does an aqueous solution of NaCl on electrolysis give hydrogen gas at cathode and not the sodium metal?Why electrolysis of NaBr and NaI gives bromine and iodine respectively while that of NaF gives oxygen instead of fluorine?What is a fuel cell? Write the cathodic and anodic reaction ofH2-O2 fuel cell.Explain Kohlrausch’s Law of independent migration of ions. Mention its two important applications.The measured resistance of a conductivity cell containing7.5 x 10 –3 M solution of KCl at 25oC was 105 ohm’s. Calculate (i) Specific conductance (ii)Molar conductance of the solution. The cell constant is 1.25 /cm .A Zn rod is dipped in 0.1 M solution of zinc sulphate. The salt is 95% dissociated at this dilution at 298 K. Calculate the electrode potential.EoZn+2/Zn(s)= -0.76VCalculate the emf of the cell Cd|Cd+2(0.10M) || H+(0.20M)|Pt,H2(0.5atm)Given Eo for Cd+2/Cd =-0.403V R=8.314 J/k/mol F=96500CAccount for the following (i) Alkaline medium inhibits the rusting of iron.(ii) Iron does not rust even if the Zn coating is broken in a galvanized iron pipe.(a) State two advantage of fuel cell over ordinary cells.(b) Silver is electrodeposited on a metallic vessel of total

surface area 900 sq.cm. By passing a current of 0.5 A for two hours. Calculate the thickness of silver deposited. Given density of Ag=10.5g/cu cmAt.mass of Ag=108 amu Give reason for the following(i) Rusting of iron is quicker in saline water than in ordinary water(ii) Aluminum metal can not be produced by the electrolysis of aqueous solution of aluminum salt.Cu+2 + 2e Cu Eo =0.34VAg+ +1e Ag Eo = 0.80V(i) Construct the galvanic cell using the above data(ii) For what concentration silver ions will the emf of the cell be 0 at 298K if the concentration of copper ion is 0.01MWhat is the emf of the cell when the cell reaction attains equilibrium?Can Nickel spatula be used to stir a copper sulphate solution? Support your answer with the reason. Given Eo Ni+2/Ni = -0.25V Eo Cu+2/Cu=0.34VHow many faraday of charge required converting I mole of MnO-4to Mn+2 ion?

CHAPTER 4 CHEMICAL KINETICSWrite expression for rate of reaction in terms of each reactant and product for the reaction N2 + 3H2 2NH3Why in general a reaction does not proceed with uniform rate throughout?When does the average rate of reaction become equal to instantaneous rate?The rate of decomposition of a substance A becomes eight times when its concentration is doubled. What is the order of reaction?The rate of reaction is given by a equation Rate = k [A]2[B]What are the units for the rate and the rate constant for this reaction?

Define threshold energy of a reaction. Define the following(i) Activation energy

(ii) Effective collision(iii) Collision frequencyA reaction 50% conpleted in two hours and 75% completed in 4 hours. What is the order of reaction?Show that time required for the completion of ¾ of a first order reaction is twice the time required for the completion of the half reaction?The rate of a reaction : 2NO + Cl2 2NOCl is doubled when concentration of Cl2 is doubled and it becomes eight times when concentration of both NO and Cl2 are doubled. Deduce the order of reaction. A reaction is 50% complete in 20 minutes at 300 K and the same reaction is again 50% completed in 5 mts at 350K. Calculate the activation energy if it is a first order reactin. Given R=8.314 J/K/molAt 380oC the half life period for the first order decomposition of H2O2 is360 minutes the energy of activation of the reaction is 200 kJ/mol. Calculate the time required for 75% decomposition at 450oCThe rate of a perticular reaction triples and temprature change from 50oC to 100oC. Calculate the activation energy of the reaction. Rate constant k of a reaction varies with the temprature according to the equation log k = constant – Ea/ 2.303RT where Ea is the activation energy.When a graph plotted for log k versus 1/T a straight line with slope –6670 is obtained . Calculate Ea of the reaction.

CHAPTER 5 SURFACE CHEMISTRYWhat is sorption?Which will be adsorbed more readily on the surface of the charcoal and why? Ammonia or carbon dioxide.In case of chemisorptions why does adsorption first increases and than decreases?What are aerosols? Give two examples.Explain emulsions with two examples.What is meant by critical micellisation concentration?What is Kraft’s temperature?Why do colloidal solutions exhibit Tyndall effect?What is meant by the term peptization?

Give one example each(i) Associated colloid(ii) Macro colloidWhat is the cause of the charge on the colloidal solution?How does size of particles of adsorbent, pressure of gas and prevailing temperature influence the extant of adsorption of a gas on a solid?What is meant by “shape selective catalyst “?Explain coagulation takes place when sodium chloride solution added to a colloidal solution of ferric chloride?

Class 12th

Biology

Class 12th

Maths

Class 12th

CS

Class 12th

IP 1 While working in Netbeans, Ms Kanta Surbhi wants to display 'Cleared' or 'Re-attempt required' message depending the marks entered in jTextField. Help her to choose more appropriate statement out of 'If statement' and 'Switch statement' [2]

2 What is the purpose of break statement in a loop? [2]3 How is <UL> tag different from <OL> tag of HTML? [2]4 What is the use of <H1> tag in an HTMT document?[2]5 How many times are the following loops executed? int num=5; do{System.out.println(num+1); num- -; } while num !=0); [2]6 Differentiate between HTML and XML [2]7 Write Java code that takes the price of a pencil from

jTextField1 and quantity of pencils from jTextField2 and calculates total amount as price * quantity to be displayed in jTextField3 and also find 10% tax amount to be displayed in jTextField4. [4]

8 What will be displayed in of jTextField1 after executing

the following code? int m = 16 ; m = m+l ;. if (m<15) jTextField.setText (Integer. toString (m) ) ; else jTextField.setText (Integer. toString (m+15) ) ; [2]9 Rewrite the following program code using a Switch

statement: if (code ==1) Month = "January"; else if (code ==2) Month = "February"; else if (code==3) Month = "March"; else if (code==4) Month = "April"; else Month = "No Match"; [2]10 What will be displayed in jTextArea1 after the

execution of the following code? int z=4; do { jTextArea1.setText(Integer.toString(++Z)); Z=Z+1; }while(Z<=8); [2]

Class 12th

ACCOUNTANCY Solve four numericals (8 marks) from board

question paper.Class 12th

BUSINESS STUDIES BUSINESS STUDIES: 7 case studies from board

question paper, each from each chapter taught.

Class 12th

Economics