## 2 Hour Review Test (2.0 HRT), Class X

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• ### Arun M

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Topics Covered : Polynomials, Linear Equations in Two variables, Quadratic Equations, Chemical Equations, Acid Bases Salts, Electricity and Magnetic effects of Electricity.

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Class X 2 HOUR REVIEW TEST ( 2.0 HRT) Max. Marks 240 Time 2 HRS ( Topics Covered : Polynomials, Linear Equations in Two variables, Quadratic Equations, Chemical equations, Acid bases Salts, Electricity and Magnetic effects of Electricity ) General Instructions : L) 2) 3.) 4) 5) All questions are compulsory. Each question carry EQUAL marks This paper consists of THREE Sections. Section A ( Maths ), Section B ( Physics ), Section C ( Chemistry ) Section A contains 30 MCQ Section B 15 MCQ and Section C also 15 MCQ For each correct answer 4 marks will be allotted and for each incorrect answer 1 mark will be deducted. Rough work should be done only on space provided for this purpose. No extra sheets will be provided. Dated : 26.06.2016
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SECTION ( A MATHS If 2 is a root of the equation x2+bX+ 12 = 0 and the equation x2 + bx + q = 0 has equal 1. roots , then q = c) 16 2. 3. 4. 5. 6. 7. 8. 9. 81 sq. units d)- 16 If x = 1 is a common root of the equation ax +ax+ 3 = 0 and the equation x + x + b = 0, then ab = b) 3/2 If a and b can take values 1, 2, 3 , 4, Then the number of equations of the form ax2+bx+ 1 = 0 having equal roots is a) 10 d) 12 If the sum of the roots of the equation x -x = oc(2x—1) is zero, then d) 1/2 If one root of the equation 4x2 - 2x + ( oc- 4 ) = 0 be the reciprocal of the other, then Solve for x : Solve for x : a) -5, 5/2 [1/ (x-1) (x-2) ] + [1/ (x-2) (x-3)] + [1/ (x-3 ) (x-4 ) ] = 1/6 b) 5, - 5/2 c) -5, - 5/2 d) 5, 5/2 For what value of k, (4— k + ( 2k + 4 )x + (8k + 1 ) = 0, is a perfect square If the equation ( 1 + m2 + 2mcx + (c 2 — a2 ) = 0 has equal roots, then, a) b) c) d) c2(1-m2) 10. A peacock is sitting on the top of a pillar, which is 9 m high. From a point 27 m away from the bottom of the pillar, a snake is coming to its hole at the base of the pillar. Seeing the snake the peacock pounces on it. If there speeds are equal, at what distance from the hole is the snake caught? a) 21m b) 12 m d) None of these 11. If am bl, then system of equations ax + by = c and my = n a) has a unique solution b) has no solution c) has infinitely many solutions d) may or may not have a solution 12. If 2x— 3y = 7 and (a+b)x — (a+b-3)y = 4a + b represent coincident lines, then a and b satisfy the equation a) a +5b = 0 b) 5a+b=0 -5b=O 13. The area of the triangle formed by lines y = x, x = 6 and y = 0 is a) 36 sq. units b) 18 sq. units c) d) 9 sq. units
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14. Solve for x and y , a) x=3,y=-2 15. Solve for x and y , and 501 , and x + y = 2m, a) x = m + n,y=m-n b) x = m + n, y = m + n c) x = m -n, y = m + n d)x=m n + 101y = 499 mx-ny=m + n Y=m-n 16. On selling a TV at 5% gain and a fridge at 10% gain, a shopkeeper gains Rs. 2000. But if he sells the TV at 10 % gain and the fridge at 5% loss, he gains Rs. 1500 on the transaction. Actual prices of TV and fridge are a) 10000, 20000 b) 20000, 10000 c) 2000, 1000 d) None of these 17. The sum of two digit number and the number formed by reversing the order of digits is 66. If the two digits differ by 2, find the possible numbers a) 20 or 42 b) 53 or 24 c) None of these d) 42 0 r 24 18. A boat goes 12 km upstream and 40 km downstream in 8 hrs. It can go 16 km upstream and 32 km downstream in the same time. Speed of the boat in still water and the speed of the stream in km / hr. are 19. Places A and B are 80 km apart from each other on a highway. A car starts from A and other from B at the same time. If they move in the same direction, they meet in 8 hours and if they move in opposite direction, they meet in 1 hr. and 20 minutes. Speeds of the cars A and B in km / hr. are a) 20, 35 b) 25, 35 c) 35, 25 d) 25, 30 20. If adding two fractions A/ ( x + 2 ) and B / ( 2x— 3 ), we get a fraction equivalent to ( 5x— 11 ) / ( + x —6 ) then value of A—B is d) Cannot be find 21. If one zero of the polynomial f(x) = (1
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27. If a,ß are the zeros of the polynomial f(x) = 2x2 + 5x+ k satisfying the relation a ß2 + aß = 21 / 4, then value of k for this to be possible d) None of these 28. Let a,ß be the roots of ax2 + bx + c = 0 and are the roots of px2+ qx + r = 0. DI , D2 be the respective discriminants of these equations. If a + ö = ß+ y then ratio of DI and D2 is a) p2:a 2 2 d) None of these 29. A dealer sells a toy for Rs. 24. and gain as much per cent as the cost price of the toy. Cost price of the toy is a) 25 b) 20 c) 21 d) 200 30. Two trains leave a railway station at the same time. The first train travels due West and the second train due North. The first train travels 5 km / hr. faster than the second train. If after two hours they are 50 km apart, than average speed of first and second train in km / hr is a) 15,20 b) 20, 25 c) 20, 15 d) 25, 20 SECTION ( B ) - PHYSICS 31. The potential difference between the terminals of an electric heater is 60 V when it draws a current of 4 A from the source. What current will the heater draw if the potential difference is increased to 120 V ? b) 1/8 A d) 1/4 A 32. Two resistors 4 ohm and 6 ohm are connected in parallel. The combination is connected across a 6V battery of negligible resistance. Current through each resistor is a) IA, 1.5 A c) 1.5A, 1.5 A d) 1.5 A, IA 33. A 6V — 12W lamp is connected in series with a source of 12V supply. Value of the resistance R for the proper working of the lamp is a) 4 ohm b) 6 ohm c) 3 ohm d) 1/3 ohm 34. Two bulbs A and B are rated IOOW — 120V and IOW — 120W respectively. They are connected in parallel across a 120 V source. Current in each bulb is ? a) 0.80 A, 0.080 A b) 0.83 A, 0.083 A c) 0.70 A, 0.073 A d) None ofthese 35. When three identical bulbs of 60W — 200V rating are connected in series to a 200 V supply, the power drawn by them will be : a) 60 w b) 180 W c) 10 w d) 20 w 36. If the current I through a resistor is increased by 100 % , the increase in power dissipated will be : a) 100% b) 200 0/0 c) 300% d) No increase
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37. In an electrical circuit three incandescent bulbs A, B and C of rating 40W, 60W and IOOW respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness : a) Brightness of all the bulbs will be the same b) Brightness of bulb A will be the maximum c) Brightness of bulb B will be more than that of A d) Brightness of bulb C will be less than that of B 38. Two wires A and B are made of copper. Both wires are 1m long but wire A is 1 mm thk. and wire B is 2 mm thk. The resistivity is a) More for A b) more for B c) same for A and B d) cannot be compared 39. A wire of resistance 1 ohm is divided into n equal parts which are then connected in parallel. The new resistance will be : b) 1/n2 40. Two lamps rated IOOW — 220V and 60W — 220V are connected in parallel to a 220 V supply. Current drawn from the supply line is : a) 11/8 A b) 8/11 A 41. The frequency of AC mains in India is . a) 30 cycles/sec b) 60 Hz. c) 8/ IOA c) 50 cycles/sec d) None of these d) OHz. 42. An electron projected towards East gets deflected towards North by a magnetic field. The direction of magnetic field is . a) Towards South b) Towards East c) Upward d) Downward 43. Two resistances are joined in parallel whose resultant is 6 / 8 ohm. One of the resistance wire is broken and the effective resistance becomes 2 ohm. Then the resistance in ohm of the wire that got broken was : a) 3/5 c) 6/5 n 44. There are n similar conductors each of resistance R. The resultant resistance comes out to be x when connected in parallel. If they are connected in series, the resistance comes out to be : a) x/n2 b) n2x d) nx 45. Dimensions of a block are 1 cm x 1 cm x 100 cm. If specific resistance of its material is 3 x 10 ohm. m, then the resistance between its opposite rectangular faces is : a) 3 x 10 9 ohm b) 3 x 10-7 ohm c) 3 x 10 7 ohm d) 3 x 10-5 ohm SECTION ( C ) - CHEMISTRY 46. The colour of N02 and PbO formed when lead nitrate is heated are : a) brown , green b) brown , yellow c) brown , colourless d) colourless, yellow 47. On heating ferrous sulphate crystals, one would get : a) sweet smell b) rotten egg smell c) irritating choking smell d) none of these 48. Which of the following salts does not contain water of crystallisation : a) Blue vitriol b) baking soda c) washing soda d) gypsum 49. Which of the following substance will not give C02 on treatment with dilute acid .
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a) marble b) limestone c) baking soda 50. Which of the following is used for dissolution of gold . a) Hydrochloric acid b) Sulphuric acid c) Nitric acid d) lime d) Aqua regia -10 51. If H ion concentration in a solution is 1 x 10 then concentration of OH ion in the solution will be : -5 a) 1 x 10 -10 b) 1 x 10 -4 c) 1 x 10 d) 1 x 10+4 52. If OH ion concentration in a solution is 1 x 10-8, then pH of the solution is : 53. a H2S04 + bNaOH c Na2 S04 + d 1-120 : Sum of a, b, cand d is d) None of these 54. Which of the following can be used as an acid — base indicator by a visually impaired student : a) Petunia leave b) turmeric c) Vanilla essence d) both a) as well as c) 55. What is the condition of neutralisation : b) [Acid] = [Base] c) depends on acid and base nature d) can't say 56. Plaster of Paris is . a) CaS04 b) CaS04. 1-120 c) CaS04.2H20 d) CaS04. 1/2 H20 57. The products of chlor — alkali process are: a) NaCl, C12 and 1-12 b) NaOH, C12 and 1-12 c) Na2C03, and 1-120 d) NaOH, C12 and HCI 58. The conversion of 1
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SPACE FOR ROUGH WORK
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1) 4) 5) 7) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) 21) 22) 23) 24) 25) 26) 27) 28) 29) 30) 31) 32) O O O O O O O O O o O O O o O O O o O O O O O O O O O O O O o O O o O O O o O O O O O O O o O O O O o O O O o O O O o O O O O O Answer Sheet O o O O O o O O O O O O O o O O O O o O O O o O O O o O O O O O
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33) 34) 35) 36) 37) 38) 39) 40) 41) 42) 43) 44) 45) 46) 47) 48) 49) 50) 51) 52) 53) 54) 55) 56) 57) 58) 59) 60) O O O O O O O O O O O O o O O O o O O O o O O O O O O O O O O O o O O O o O O O O O O O o O O O O o O O O o O O O O O O o O O O o O O O O O O O o O O O O o O O O o O O

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