Class vi English. Hindi

Transcription

1 Summer Break Holiday Homework ( ) Class vi English 1. Write a short story and learn it by heart. 2. Write a poem and learn it by heart. 3. Learn Questions and answers from the lesson Who did Patrick s Homework & A Tale of two birds. 4. Write paragraph on An Indian Festival & My Aim in life in 80 to 100 words. 5. Write one page hand writing daily in Scrap Book. 6. Write Antonyms of:- (i) Low (ii) Timid (iii) Narrow (iv) Deep (v) Hate (vi) Sufficient (vii) Rude (viii) Pure (ix) Good (x) End (xi) Loud (xii) Close Hindi न ट : छ ट ट म क ग हक मय क क ऩ अरग स फन म 1. अऩन स क र क प स भ फ़ कयव न क लरए अऩन प र च मय ज क एक प र थयन ऩत र लरख 2. ब ई क श द भ ज न क लरए द ट टदन क अवक श ह त एक प र थयन ऩत र लरख 3. ननम न ववषम ऩय 100 शब द भ ननफ ध लरख (अ) भ य वप रम अध म ऩक (फ) गभ क छ ट ट म 4. अऩन ऩस द क क ई एक कववत क टस थ कय भ ह वय लरख ववर भ शब द लरख

2 7. ननम न शब द क ऩम यमव च शब द लरख स यज च द व म अग नन कभर भ त क ष ण घ ड़ आ ख सयस वत Maths DO ALL QUESTIONS IN SEPARATE NOTEBOOK Q 1 How many grams in 1 Kg? Q 2 How many millilitres make 1 litre? Q 3 Write the smallest even prime number. Q 4 Write smallest composite No. Q 5 Estimate the product using general rules : Q 6 Arrange the following numbers in ascending order: 647, 9754,89320, 570 Q 7 Find the value of (30)+(-23)+(-63)+(+55). Q 8 Population of Sundarnagar was 2,35,471 in the year In the year 2001 it was found to be increased by 72,958. What was the population of the city in 2001? Q 9 Find the common factors of : (a) 20 and 28 (b) 35 and 50 (c) 15 and 25 Q10 Write and learn tables from 16 to 20. Q.1 Name five plants and their parts we eat. Q.2 Write ingredients of kheer. Q.3 What is the food of honeybees? Q.4 Write names of five carnivores. Science

3 Q.5 Write names of five herbivores. Q.6 What is a balanced diet? Q.7Fill in the blanks is caused by deficiency of Vitamin D. 2-Deficiency of...causes a disease known as beri-beri. 3-Deficiency of Vitamin C causes a disease known as... 4-Night blindness is caused due to the deficiency of...in our food. 5-Parrot eats only...products. Q.8Draw sources of Carbohydrates, Proteins, Vitamin-A, Vitamin-B,Vitamin-C,Vitamin-D in activity fiie. Q.9 Collect and paste pictures of sources of minerals in our food in your file. Q.10 Read lesson 1 and 2. Q.11 Learn quest. ans.of lesson 1 and 2. Q.12 Collect four DOHEY of poet Kabir and write in your file. Learn these DOHEY by heart. Social science 1. Write name of President, Vice President, P.M. and Chief of Justice of India. 2. Any 5 important news with paper cutting. Geography- Q1- a, b, c, d Q.2 Q.3 History Q1,2,& 5 Civics Q.1 & 2 Sanskrit 1 शCn :Ik fy[kks ^ckyd^ शCn ¼vdkjkUr iqfyyax½] ^ckfydk^ शCn ¼vkdkjkUr L=hfyax½ 2 /kkrq:ik fy[kks ^ib~^ /kkrq ¼i<+uk½ yv~ydkj y`v~ydkj

4 3 dksbz ikwap 'yksd fy[kks vkssj ;kn djksa Class vii English 1. You are Kiran school captain are K.V.RRC Fatehgarh write a notice in farming the students about a debate competition to be held on May 9, Write a letter to your father requesting him to buy a cycle. 3. Write three forms- Fly, frbid, win, mean,kneel,lie,feed,weep,shoot,put,tell,seek,say,catch. 4. Write a short paragraph on any one topic 100 words. (i) Trees are our best friend. (ii) Your favorite subject. Hindi 1. अऩन लभत र क ऩत र लरखकय अऩन ववद म रम भ भन म गए व वषयक त सव क फ य भ फत म 2. आऩक भ हल र भ गन दग प र यह ह नगयऩ लरक क अध म क ऩत र लरखकय स चचत कय 3. ननम न ववषम ऩय 100 शब द भ ननफ ध लरख - (अ) ऩम यवयण प रद षण (फ) व रग ओ, ज वन फच ओ 4. हभ ऩ उन भ क त गगन क, द द भ प रकयण क प रश न उत तय म द कय 5. अऩन ऩस द क एक कववत क ठस थ कय भ ह वय तथ उनक व क म प रम ग लरख 7. सब ऩ ठ क कवव एव र खक क न भ लरखकय अभ म स कय 8. ननम न शब द क ऩम यमव च शब द लरख स यज च द भ त क ष ण

5 व म घ ड़ अग नन कभर आ ख सयस वत Maths 1. All examples and try these of chapter no Question n.5 of exercise no Question n.9 of exercise no Question n.3,5 of exercise no All examples and try these of chapter no. 2. Up to page no. 45. Science 1. Learn and write all the question and answers from exercise of chapter 1 and 2 2. Draw the well labeled diagram of the following 3. 1.photosynthsis 2. Digestive system in humans 3. Arrangement of teeth 4. Taste regions on tongue 5. Stomata of leaf 4. Attempt the following questions 1. What are lichens? 2. Name the bacteria which fix the atmospheric nitrogen. 3. How the nutrients are replenished into the soil? 4. How do fungi obtain its food? 5. What are stomata? 6. WHAT IS CELL? 7. What is pancreas? What are its functions? 8. What is egestion? 9. What is assimilation? 10. Draw the digestive system of rumnants. 11. Draw the diagram of amoeba obtaining its food.

6 12. What is digestion? 13. What are pseudopodia? 14. What is given to patient suffering from diarrhea? 15. What is rumination? Social science 1. Reading and learning of Chapters 1-3from all the three books. Sanskrit 1 la[;k okpd 'kcn lald`r esa fy[kks ¼1 ls 05 तक ( 2 /kkrq:ik fy[kks ^[kkn~^ /kkrq ¼[kkuk½ yv~ydkj, y`v~ydkj,र टरक य 3 dksbz ikwap 'yksd fy[kks vkssj ;kn djksa Class viii English 1. You are Kiran school captain are K.V.RRC Fatehgarh write a notice in farming the students about a debate competition to be held on May 9, Write a letter to your father requesting him to buy a cycle. 3. Write three forms- Fly, frbid, win, mean,kneel,lie, feed, weep, shoot, put, tell, seek, say, catch. 4. Write a short paragraph on any one topic 100 words. (iii) Trees are our best friend.

7 (iv) Your favorite subject. Hindi 1. ननम न ब षय ऩर नन द लऱख ए (१०० शब द म ) क. षष ऋत. प र य त य ह र ग. अन स सन और प र द य र थ घ. द ष क भ 2. ननम न ब षय ऩर ऩत र लऱ य - क च र ददन क अब क श च यष क लमत र क जन मददन ऩर ध ई ऩक त त रइ ग प र द य ऱय म ऱ क स म न म गन क लऱए च यष क ऩत र शब द लऱ कर उनक ब ऱ शब द लऱख ए क 20 शब द लऱ कर उनक नतन-नतन ऩर य य च लऱख ए ग ऩद ए गए ऩर थ क य द क जजए Maths 1. Using appropriate properties calculate 2. Find ten rational numbers between 3/5 and ¾ years from now Ravi s age will be four times his present age. What is Ravi s present age? 4. Arjun is twice as old as Shreya. Five years ago his age was three times Shreya s age. Find their present ages. 5. The age of Hari and Harry are in the ratio of 5:7. Fours years from now the ratio of their age will be 3:4:7. Find their ages? 6. Find X, X+7-7. The sum of three consecutive multiples of 8 is 888. Find the multiples? 8. 15(y-4) 2(y-9) + 5(5y+6) =0 9. Find Y, 2Y+ - Y.

8 Science 1.Name two Rabi and kharif crops. 2.What are the different agricultural practices. 3.What are weeds?write two methods to remove weeds. 4.Differentiate manure and fertilisers. 5.Define the following terms- Nitrogen fixation Drip irrigation 6.Why is it necessary to add manure and fertilisers to soil? 7.What is crop rotation? State its importance in crop fields. 8.What are the different categories of microorganisms? 9.What are antibiotics? Name the first antibiotic prepared and by whom? 10.Name two water borne and air borne diseases. 11.Name two diseases each caused by bacteria and virus. 12.Draw neat diagram of Nitrogen cycle. 13.List any two areas in which microorganisms are useful and harmful to us. 14.What is pasteurization? 15.What do you understand by food preservation?write any two methods to preserve food. sanskrit 1 la[;k okpd 'kcn lald`r esa fy[kks )51 ls 100 तक( 2 /kkrq:ik fy[kks ^pj~^ /kkrq yv~ydkj, y`v~ydkj,yksv~ रक य 3 dksbz ikwap 'yksd fy[kks vkssj ;kn djksa

9 Class ix English 1. Write a letter to your friend about how you spent your summer vacations. 2. Recently we have celebrated our Annual Day on Write a diary entry in about words about annual day celebration in your school and the event you participated in. 3. Write one-one paragraph on each of the musicians mentioned in the lesson The sound of music. 4. Learn all the question answers from all the chapters taught before summer vacations. 5. What would you like more, the mechanical teachers and e-schoolroom or your present school with real teachers? Give reasons for your choice in about words. 1. ननफ ध र खन Hindi ननम नलरखखत ववषम ऩय ननफ ध लरखखए :- (i) ज वन भ ख र क भहत व (ii) भ फ इर प न स ऩग त त औय ववऩग त त क तयह स स खद औय द खद ह (iii) आज क ब यत म न य (iv) द ननक ज वन भ वव न २. ऩत र र खन :- (i) लश क भहत व फत त ह ए ब ई क ऩत र लरखखए (ii) अनज न भ ह ई ब र क लरए भ भ गत ह ए वऩत ज क ऩत र लरखखए (iii) प रध न च मय क ऩत र लरखकय स व स म र ब ह त त न ट टदन क अवक श प र प त क ग जम (iv) आऩक भ हल र भ वष य क क यण उत ऩन न ह ई जर बय व क सभस म क ओय ध म न आक ष ट कय न क लरए नगय ऩ लरक क फ ढ़ अचधक य क ऩत र लरख 3 अर क य क ब द फत त ह ए उनक उदह यण लरख 4. 3 सभ स क ब द लरखकय उनक ऩरयब ष व उनक उदह यण लरख 5. ऩट टठत ऩ ठ क लरखकय अभ म स कय Do all questions in separate copy Q1 Factorise x x x + 20 Maths

10 Q2 Simplify: + - Q 3 Multiply 6 5 by 8 8 Q 4 Find the value of 5x 4x at x = -1 Q 5 The origin lies on (a) X axis (b) y axis ( c ) neither x axis nor y axis (d) both the axis Q 6 (i) Simplify the expression: (ii) Express in p/q form, where p and q are integers. Q 7 Give the geometric representations of 2x + 9 = 0 as an equation. (i) (ii) In two variable In one variable Q 8 Learn and write the identities of polynomials. Lesson Matter in our surroundings. Science Q.1 List any three properties of particles of matter. Q.2 What happens when you open a bottle of perfume? Q.3 Suggest one method to liquefy gases. Q.4 Give two factors which determine the rate of diffusion of a liquid in another liquid. Q.5 [A] What temperature in Kelvin scale is equal to 50 o C. [B]Describe an activity to show that rate of evaporation increases with increase in surface area. Q.6 What term is used for following processes- A] Conversion of a solid into liquid on heating. B] Conversion of a gas into liquid on cooling. C] Conversion of a solid into gas directly on cooling. Q.7 What are four factors which effect evaporation?

11 Q.8 What is dry ice? What is its use? Q.9 Write the full form of CNG and LPG. Q.10 Why does desert cooler cools better on a hot dry day? Lesson- The fundamental unit of life Q.1Name the nucleic acids present in a cell. Give their full form. Q.2 Which two plant cell organelles have their own genetic materials and proteins? Q.3 What is the chemical composition of cell wall? Q.4 Which type of animal cell lacks both mitochondria and endoplasmic reticulum? Q.5 How do substances like CO 2 and O 2 move in and out of the cell? Q.6 What is membrane biogenesis? Q.7 Name the terms for the following processes- 1-shrinkage of cell content due to dehydration. 2-engulfing food by amoeba. Q.8Differentiate between Prokaryotic and Eukaryotic cell. Q.9 Draw plant cell and animal cell. Q.10 Read lesson Matter in our surroundings and lesson The fundamental unit of life. Lesson Motion Q.1Derive the three equations of motion graphically. Q.2 Practice numericals given in exercise. Q.3 Learn quest. answers of the lesson. Social science 1. Write about disaster management in India. 2. What are the cause of train accident? How can we control it? 3. First lesson of all the four books (prescribed) 1 mark question marks question 3 5 marks questions -3 (Question should be done from all the four lessons)

12 Class x English 1. write the character sketch of a. Helen keller b. Arthur H. keller c. kate adams keller d. Martha Washington e. Ms. Anne Sullivan 2. read chapter 1to5 of the novel the story of my life and answer these questions. a. write a short note on early life of Helen keller. b. Helen was naughty child. Describe the incident of her early child hood. c. Helen s determination to provide her. Doll with eyes reflects her own desire to be able to see again. Discuss. d. how did Miss Sullivan teach Helen to spell words into her hands. e. Helen s attraction towards nature with her first lesson? what did she / learn about nature? Maths Q.1- Find the HCF using Euclid division algorithm-

13 (i) 210 and 55 (ii) 6552 and 240 Q.2- Ex-1.1 Q.5 Q.3- Ex.1.2 Q.2.,Q4,Q.5 Q.4- prove that following numbers are irrational- (i) 3 (ii) (iii) Q.5-Ex.2.2 Q.1-(iii), (vi) Q.6-Find a quadratic polynomial whose zeroes are- (i) -3, 5 (ii) 7, -6 Q.7- Ex.2.3 -Q.3 Q.2 Q.8- Ex.3.2-Q.7 Ex3.4-Q1 Ex-3.6 Q1 (ii) (viii) Q.9- Ex- Q2 Q.10- Ex4.2 -Q1 (ii) (iv) Ex Q1 (i),(iii) 1 st : Chapter-Chemical reactions and equations Science 1. On what basis is a chemical equation balanced? 2. Why do gold and platinum not corrode in moist air? 3. Why should magnesium ribbon be cleaned before burning in air? 4. Give an example of double displacement reaction? 5. State the main difference between an endothermic and exothermic reaction? 6. What happen chemically when quicklime is added to water filled in a bucket? 7. Give two examples of redox reactions? 8. Why do potato chips manufacturers fill the packet of chips with nitrogen gas? 9. Why is respiration considered an endothermic reaction? nd : Chapter-Acids,bases and salts.

14 1Write formula of bleaching powder, plaster of paris, baking soda, washing soda and gypsum. 11. What happens when chlorine gas is passed over dry slaked lime?write balanced chemical reaction also. 12. What does ph stand for? Which has a higher ph value conc. HCl or dil HCl. 13. What happens when Nitric acid is added to egg shell? 14. Name the products formed in Chlor-alkali process Name the gases librated at cathode and at anode. 15. Why does dry HCl gas not change the colour of dry litmus paper?. 16. Write chemical equation for the reaction of bases with 1-a metal 2-an acid 3-with a non metallic oxide 3 rd : Chapter-Life processes A Draw and label- I Human digestive system. Ii Human respiratory system. Iii Human excretory system. Iv Stomata. What is the role of bile juice in digestion? Define Photosynthesis, Transpiration, Translocation, holozoic nutrition. Write difference between autotrophic and heterotrophic mode of nutrition? What are stomata? State their two function? List the three events that occur during photosynthesis? Where does digestion of starch start in our digestive system? Name the enzyme that acts on it. 8. Complete exercise of the lesson. Acids, bases and salts. 9. Read lesson 1, 2 and 3 thoroughly. Social science 1. What is disaster management? How is it organized in India? 2. What are the causes of flood? How can we mitigate its impact? 3. Write one mark question(4 from each four lessons) Three marks questions (3 from each four lessons) Five marks questions (3 from each four lessons) 4. Enclose map of India showing different kinds of soils distributed in India.

15 Class xii English Solve 1. Last 5 year CBSE Class XII Board Exam Paper (A & B Section). 2. Read the Novel. 3. & Write Biography of the characters include Name, Special features, involvement in the story (Write in points, not in paragraph). Hindi 1. क ऩ भ लरख म गए सब प रश न त तय त म य कय 2. ननम न बफन द ओ ऩय आर ख लरख (क) (ख) फ ट फच ओ फ ट ऩढ ओ ग ग सप ई अलबम न 3. ननम न बफन द ओ ऩय रगबग 150 शब द क अन च छ द लरख (क) (ख) सवय लश अलबम न भह ग ई क सभस म Physics ELECTROSTATICS 1. Define dielectric constant of a medium in terms of force between electric charges. What is its S.I. unit? (1) 2. Two same balls having equal positive charge Coulombs are suspended by two insulating strings of equal length. What would be the effect on the force when a plastic sheet is inserted between the two? (1)

16 3. Does the charge given to a metallic sphere depend on whether it is hollow or solid? Give reason for your answer. (1) 4. (i) What is the physical significance of electric field? (ii) Write an expression for force acting on a test charge placed in a uniform electric field. (2) 5. Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason. (1) 6. Define electric potential at a point. Write its S.I. unit. Is potential a scalar or vector? (2) 7. Why is the potential inside a hollow spherical charged conductor constant and has the same value as on its surface? (1) 8. A point charge is placed at a point as shown in the figure. Is the potential difference positive, negative or zero? (1) 9. Why do the electrostatic filed lines not form closed loops? (1) 10. (i) A point charge is placed in the vicinity of a conducting surface. Trace the field lines between the charge and the conducting surface. (ii) Draw the electric field lines due to uniformly charged thin spherical shell when charge on the shell is (a) positive, (b) negative. (2) 11. Define dipole moment. Write its S.I. unit. Is it a scalar or vector quantity? (1) 12. Depict the orientation of the dipole in (i) stable, (ii) unstable equilibrium in a uniform electric field. (2) 13. Find the work done in rotating the dipole from stable to unstable equilibrium in a uniform electric field. (2) 14. Define electric flux. Write its S.I. unit. (2) 15. A charge is enclosed by a spherical surface. If the radius is doubled/reduced to half, how would the electric flux through the surface change? (1) 16. The figure shows field lines of a positive point charge. What will be the sign of the potential energy deference of a small negative charge between the points and. Justify your answer. (2) 17. Why does the separation between successive equipotential surfaces get wider as the distance from the charges increases? (1) 18. A charge is being moved from a point above a dipole of dipole moment to a point below the dipole in equatorial plane without acceleration. Find the work done in the process. (1) 19. Define the capacitance of a capacitor. On what factors does it depends? (2) 20. (i) Define the term polarization of a dielectric.

17 (ii) Write a relation for polarization of a dielectric material in the presence of an external electric field (2) 21. The graph shows the variation of voltage V across the plates of two capacitors A and B versus increase of charge Q stored on them. Which of the capacitors has higher capacitance? Give reason for your answer. (1) 22. (i) An electric dipole is held in a uniform electric field. Using suitable diagram show that it does not undergo any translatory motion. Derive the expression for the torque acting on it. (ii) What would happen if the field in non-uniform? (iii) What would happen if the external electric field is increasing (a) parallel to and (b) anti-parallel to? (5) 23. (i) Draw 3 equipotential surfaces corresponding to a field that uniformly increases in magnitude but remains constant along z-direction. (ii) How are these surfaces different from that of a constant electric field along z- direction? (2) 24. Using Gauss s law, obtain the expression for electric field intensity at a point due to an infinitely large, plane sheet of charge of charge density C/m 2. How is the field directed if the sheet is (i) positively charged (ii) negatively charged? (5) 25. A slab of material of dielectric constant has the same area as that of the plates of a parallel plate capacitor but has the thickness 3d/4, where d is the separation between the plates. Find out the expression for its capacitance when the slab is inserted between the plates of the capacitor. (3) 26. Prove that the total electrostatic energy stored in a parallel plate capacitor is. Hence derive an expression for energy density of the capacitor. How does the stored energy change if air is replaced by medium of dielectric constant K? (5) 27. A network of four capacitors each of capacitance is connected to a supply as shown in the figure. Determine the (i) equivalent capacitance of the network and (ii) charge on each capacitor.(3)

18 28. Given the components of an electric field as =, = 0 and = 0, where is dimensional constant. Calculate the flux through the cube of side a as shown in the figure and the effective charge inside the cube.(3) 29. Two point charges 4 C and +1 C are separated by a distance of 2 m in air. Find the point on the line-joining charges at which the net electric field of the system is zero. (2) 30. Two point charges and are separated by a distance of in air. Find (i) the point on the line joining the charges, where the electrostatic potential is zero. (ii) Calculate the electrostatic potential energy of the system. (3) 31. Calculate the work done to dissociate the system of three charges placed on the vertices of an equilateral triangle of side 10 cm as shown in figure. Here. (3) CURRENT ELECTRICITY 1. (a) Define resistivity of a conductor. Write its S.I. unit. (b) On what factors does the resistivity of a conductor depend? (2) 2. Draw a graph showing the variation of resistance of a metal wire as a function of its diameter keeping its length and material constant. (1) 3. Two wires of equal length, one of copper and the other of manganin have the same resistance. Which wire is thicker? (1) 4. Nichrome and copper wires of same length and same radius are connected in series. Current I is passed through them. Which wire gets heated up more? Justify your answer. (1) 5. Define the term conductivity of a conductor. Write its S.I. unit. On what factors does it depend? (2) 6. If a wire is stretched to double its original length without loss of mass, what will be its new (a)resistivity (b) resistance? (2) 7. Explain, why allows like constantan and manganin are used for making standard resistors? (1) 8. The I-V graph for a metallic wire at two different temperatures and is as shown in the figure. Which of the two temperatures is higher and why? (1)

19 9. Figure shows a plot of current flowing through the cross section of a wire versus the time. Use the plot to find the charge flowing in through the wire. 10. Two metallic resistors are connected first in series and then in parallel across a d.c. supply. Plot of I-V graph is shown for the two cases. Which one represents a parallel combination of the resistors and why? (1) 11. Show that the current density is related to the applied electric field by the relation Where defines the conductivity of the material. (3) 12. Define internal resistance of a cell. Write any two factors on which it depends. (2) 13. The figure shows a plot of terminal voltage V versus the current i of a given cell. Calculate from the graph (a) emf of the cell and (b) internal resistance of the cell. (2) 14. A 10 V battery of negligible internal resistance is connected across a 200 V battery and a resistance of 38 as shown. Find the value of the current in the circuit. 15. How does the drift velocity of electrons in a metallic conductor vary with increase in temperature? (1) 16. (i) Define mobility of a charge carrier. Write its S.I. unit. (ii) What is its relation with relaxation time? (iii) How does the electron mobility change if (a) temperature is increased, (b) potential difference in doubled? (3) 17. (i) Plot a graph showing the variation of resistivity with temperature in the case of a semiconductor. (ii) How does one explain such behaviour, using the mathematical expression of the resistivity.(2)

20 18. Two conducting wires and of same diameter but different materials are joined in series across a battery. If the number density of electrons in is twice that in find the ratio of drift velocities of electrons in the two wires. (2) 19. A conductor of length is connected to a d.c. source of potential. If the length of the conductor is tripled by gradually stretching it, keeping constant, how will (i) drift speed of electrons and (ii) resistance of the conductor be affected? Justify your answer. (3) 20. Calculate the current drawn from the battery by the network of the resistors shown in figure. (2) 1 SOLID STATE: ASSIGNMENT QUESTIONS: Chemistry 1. Which point defect lowers the density of a crystal? 2. Why glass is called super cooled liquids? 3. Some of the very old glass objects appear slightly milky instead of being transparent - why? 4. What is anisotropy? 5. Why common salt is sometimes yellow instead of being pure white? 6. Calculate the number of atoms in a cubic unit cell having one atom on each corner and two atoms on each body diagonal. 7. The density of chromium is 7.2 g cm -3.iIf the unit cell is a cubic with length of 289pm,determine the type of unit cell (Atomic mass of Cr = 52 u and NA= atoms mol -1 ) 8. Niobium crystallizes in bcc structure. If its density is 8.55 g cm -3, calculate atomic radius of Niobium.[At. mass of Niobium= 92.9 u, NA = atoms mol -1 ] 9.. It is face centered cubic lattice A metal has cubic lattice. Edge length of lattice cell is 2A 0. The density of metal is 2.4g cm 3. How many units cell are present in 200g of metal 10.. Find the type of lattice for cube having edge length of 400 pm, atomic wt. = 60 and density = 6.25 g/cc. 2 SOLUTIONS ASSIGNMENT QUESTIONS: 1. What type of liquids form ideal solutions?

21 2. What is van thoff factor for KCl in aqueous solution? 3. Two liquids say X and Y boil at 380 K and 400 K respectively. Which of them is more volatile? Why? 4. What is the effect of rise in temperature on solubility of gases? 5. Mention a large scale use of the phenomenon called reverse osmosis. 6. The molar mass of bio molecules is determined by osmotic pressure and not by other colligative properties. Why? 7. What is the effect of temperature on Henry s law constant (KH) and on solubility of a gas on liquid? 8. What type of deviation from ideal behaviour will be shown by a solution of cyclohexane and ethanol? Why? 9. When X and Y are mixed the solution becomeswarmer and when Y and Z are mixed the solution becomes cooler. Which of this solution will exhibit positive Deviation and which will be the negative deviation? 10. The Vapour pressure of water at 293K is bar and the vapour pressure of the solution of g of a compound in 1000 g of water at the same temperature. Calculate the molar mass of the solute. 11. A solution of an inorganic compound was prepared by dissolving 6.8g in 100g of water. Calculate the osmotic pressure of this solution 298K when boiling point of this solution is C. Given Kb for water=0.52km-1 and R=0.082LatmK-1mol The molal freezing point depression constant of benzene is 4.9 K Kg mol When 3.26g of selenium is dissolved in 226 g of benzene, the observed freezing point is C lower than for the Benzene. What is the molecular formula of Selenium? Atomic mass of Se = 78.8 g mol -1 Selenium exists as a polymer of the type Sex A solution containing 12.5 g of non-electrolyte substance in 175 g of water gave a boiling point elevation of 0.70 K. Calculate the molar mass of the substance. (Elevation constant for water Kb = 52 K kg mol -1 ) 15. Name any one inorganic compound which can be used as semi permeable membrane 3 ELECTROCHEMISTRY ASSIGNMENT QUESTIONS: 1. Name two metal which can be used for cathodic protection of iron. 2. What is the relationship between E 0 cell and equilibrium constant at 298 K? 3. Name the cell used for low current devices like hearing aids, watches etc. Also give the half-cell reactions for such a cell? 4. State Kohlraush law. Write the reaction which occurs at the electrode of hydrogen- oxygen fuel cell. 5. How many Faradays of electricity are required to liberate 2 moles of hydrogen gas in electrolysis of a solution? 6. At infinite dilution the molar conductance of Na + and SO4 2- ions are 50 and 160 S cm 2 mol -1 respectively. What will be the molar conductance of sodium

22 sulphate at infinite dilution? 7. Calculate the maximum possible work that can be obtained from the following cell under the standard condition at 25 0 C. Zn Zn 2+ (aq) Cu 2+ (aq) Cu given: - E 0 Zn 2+ /Zn = V and E 0 Cu 2+ /Cu = V 8. A current of 0.50A was passed through an electrolyte solution containing AgNO3 solution with inert electrodes.the weight of Ag deposited was 1.50g.How long did the current flow? 9. What is the difference between E o cell and E cell? Calculate E cell of the following cell at 298 k : Cd/Cd 2+ (0.1M) Ag + (0.1M)/Ag Given E for Cd 2+ /Cd = V and Ag + /Ag= 0.8V 10. The half cell reaction are (i) Fe 3+ + e Fe 2+ E 0 = 0.76V (ii) Ag + (aq) + 1e Ag (S) E 0 = 0.80V Calculate Kc for the following reaction at 25 0 C Ag + (aq) + Fe 2+ Ag (S) + Fe 3+ Given 1F = C mol -1. Biology 1. How do roots take part in vegetative propagation? 2. Name any four vegetative propagules along with example. 3. What are natural methods of vegetative propagation? 4. What do we call the undifferentiated mas of cell formed in tissue culture? 5. Do all gametes formed from parent organism have the same genetic composition.analyses the situation with background of gametogenesis and provide examples 6. Fertilization is not the obligatory event for food production in certain plants explain the statement 7. Give reason why cell division can t be type of reproduction in certain plant and multicellular organism 8. Give reason why marchantia is a dioecious plant 9. Why do algae and fungi switch to sexual mode of reproduction just before onset of unfavorable condition? 10. Name the plant which came to India as contaminant is now the cause of pollen allergy 11. Cleistogamy can favour autogamy.justify 12. Explain the phenomenon of double fertilization 13. Name the part of plant which the tassel of corn cob show 14. Banana is a true fruit as well as parthenocarpic fruit explain 15. State the function of fimbriae 16. Learn and write the following system 17. Male reproductive system 18. Female reproductive system 19. Mammary gland 20 fertilization and implantation

23 Accountancy 1. Project Work Comprehensive as per CBSE Guidelines. 2. Accounting for partnership firms- Fundamentals Q. No. 7,8,9,10 - Pg.No.1.80 to 1.81 Q. No -13,14,16 Pg. No Q. No 26,27 - Pg. No 1.83 Q. No -31,32,34 - Pg. No 1.84 Q. No- 51,52,56,57 - Pg. No Q. No 59, 64, 74, 75 - Pg. No Q. No 89, 91 - Pg. No Business studies 1. Project Work to be completed from any of the topics given i.e. one topic to be selected out of the choices given, as per CBSE guidelines. 2. Revision of the chapter (a) Nature and significance of ongt. (b) Principles of management Economics 1. Attempt 15 sums on Elasticity of Demand 2. Draw all the well labled diagrams of Introduction Chapter and Theory of Demand. 3. Distinguish between change in quantity demanded and change in demand. 4. Solve all board questions given in the end of the chapter. 5. Complete all your Home Work and Class Work properly and revised each topic for test in June 2018 Geography Reading and finding of MCQ from 1-3 Chapters from both the books. Maths 1. Let S be the set of all the points in a plane and R be a relation in S defined as R = S how that R is reflexive and symmetric but not transitive.

24 2. Show that the function f: N N given by f(1) = f(2) = 1 and f(x) = x-1 for x 2, is onto but not one-one. 3. If a function f: x, x N, then find the value of fof. 4. Let R be the relation on R defined as (a, b) R iff 1+ ab> 0, a, b R. Show that R is reflexive and symmetric but not transitive. 5. Let A = {-1,0,1} and B = {0,1}. State whether the function f : A B defined by f(x) = x 2 Is bijective. 6. f(x)= 7 2x 3 7. g(x) = [x] where [x] denotes the greatest integer function. Find f o g ( 5/2 ) & g o f (- 2). 8. Which of the following represent a (a) Y = x 2 (b) y 2 = x 9. If f(x) =, (x ), show that fof -1 is an identity function. 10. If f(x) = and g(x) = log e x show that fog = gof. 11. If f(x) = x+7 and g(x) = x- fog(7). 12. If f(x) = x and g(x) = [x], Evaluate fog( ) gof( ). 13. If f(x) = and g(x) = log e, x 14. Show that the relation R = is neither reflexive, nor symmetric but transitive.

25 15. Consider f: and g: defined as f(1) = p, f(2) = q, f(3) = r, g(p) = bat, g(q) = ball, g(r) = pitch. Show that f, g and gof are invertible. Find f -1, g -1 and (gof )-1 and show that (gof) -1 = f -1 og Let A be the set of all 46 students of class XII in a school. Let f: A N be a function defined by f(x) = Roll no. of the student x. Show that f is one-one and onto. 17. Let P is the set of all the points in a plane and the relation R in set P be defined as R = Show that R is not an equivalence relation. 18. The function f is defined as To each person on earth is assigned a date of birth. Is thye function one-one? Why? 19. Let f: A B be a given function. A relation R in set A is given by R =. Check, if R is an equivalence relation. 20. Given A = and B = and f(x) = x 2 -x-2. Find f(a). Is f(a) = B? 21. Let A = = B. Show that f: A B given by f(x) = x x is a bijection. 22. If + = then prove that 4-12xy + 9 = If A = ) and B = ) then find the value of A B. 24. If + = then prove that 9-12xy + 4 = Find the value of. 26. Find the value of. 27. Prove that 2 = 28. Write each of the following in the simplest form: (a)

26 (b), -a (c) 0 x 1 (d), -a 29. If =, prove that + 2xyz = Find the value of. 31. There are 3 families A, B and C. The number of men, women and children in these families are: Men Women Children Family A Family B Family C Daily expenses of men, women and children are Rs 200, Rs 150 and Rs 200 respectively. Only men and women earn and children do not. Using matrix multiplication calculate daily expense of each family. What impact does more children in the family create on the society?\ 32. If A = and B =, then find A B. 33. Find the value of +.