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2022

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55. 35. 4 mL of HCl is required for the neuralization of a solution containing 0.275 g of sodium hydroxide. The normality of hydrochloric acid is

a.  o.97 N b. 0.142 N c. 0.194 N d. 0.244 N Ans. c (13)

54. 20mL of 10 NHCl are mixed with 10 mL of 36

N H2 SO4  and the mixture is made one litre. Normality of the mixture will be a.  0.56 N b....

52. 10mL of conc.

H2 SO4  (18 molar) is diluted to 1 litre. The approximate strength of dilute acid could be a. 0.18 N b....

53. The weight of sodium carbonate required to prepare 500 mL of a semi- normal solution is

a. 13. 25 g b. 26. 5 g c. 53 g d. 6.125 g Ans. a (12)

51. On dissolving 1 mole of each of the following acids in 1 litre water, the acid which does not give a solution of strength 1N is

a.  HCl b. perchloric acid c. HNO3 d. phosphoric acid Ans. d (12)

50. To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid the volume of 0.1 M aqueous KOH solution required is

a. 40 mL b. 20mL c. 10mL d. 60 mL Ans. a (10)

49. Normality of 2M sulphuric acid is

a. 2N b.4N c. N/2 d. N/4 Ans. b Explanation : N = M x basicity ; N = 2...

47. Two solutions of HCl, A and B have concerntrations of 0.5 and 0.1 M respectively. The volume of solutions A and B required to make 2 litres of 0.2 N HCl are

a. 0. 5 L of  A + 1.5 L of B b. 1.5 L of  A + 0.5 L of...

48. A solution contains

1.2046 x 106  hydrochloric acid molecules in one dm3  of the solution . The strength of the solution is a....

46. Volume of water needed to mix with 10 mL

10N HNO3  to get  0.1 N HNO3  a. 1000 mL b. 990 mL c. 1010 mL d. 10 mL Ans....

45. The volume of water to be added to

100 cm3   of 0.5 N H2 SO4  to get decinormal concentration is a. 400 cm3  b. 500cm3  c. 450 cm3 ...

44. How many grams of dibasic acid should be present in 100 mL of its aqueous solutions to give decionormal strenght

a. 1g b. 2g c. 10 g d. 20 g Ans. a (5)

44. A thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out. The frame is completely covered with the film. When the portion A punctured with a pin, the thread.

(a)  Becomes concave toward A (b) Becomes convex towards A (c)  Remains in the initial position (d) Either (a) or...

43. A wooden stick 2m long is floating on the surface of water. The surface tension of water 0.07 N/m. By putting soap solution on one side of the sticks the surface tension is reduced to 0.06 N/m. The net force on the stick will

(a)  0.07 N (b)  0.06 N (c)   0.01 N (d)  0.02 N Ans. d (15)

42. The dimensions of surface tension are

(a) MLT-1 (b) ML2 T-2 (c) ML0 T-2 (d) ML-1T-2 Ans. c   (10)

41. The property utilized in the manufacture of lead shots is

(a)  Specific weight of liquid lead (b)  Specific gravity of liquid lead (c)   Compressibility of liquid lead (d)  Surface tension...

40. Cohesive force is experienced between

(a)  Magnetic substances (b)  Molecules of different substances (c)   Molecules of same substances (d)  None of these Ans. (c)           The...

39. Oil spreads over the surface of water whereas water does not spread over the surface of the oil, due to

(a)  Surface tension of water is very high (b)  Surface tension of water is very low (c)   Viscosity of oil...

43. With 63 g of hydrated oxalic acid how many L of N/10 solution can be prepared

a. 100 L b. 10 L c. 1L d. 1000 L Ans. b (9)

38. The force required to separate two glass plates of area

The force required to separate two glass plates of area 10-2m2 with a film of water 0.05 mm thick between...

37. Due to which property of water, tiny particles of camphor dance on the surface of water

(a)  Viscosity (b)  Surface tension (c)   Weight (d)  Floating force Ans. b (13)

42. Which of the following solutions has the highest normality

a. 8 g  of KOH / L b. N phosphoric acid c. 6 g of NaOH/ 100 mL d. 0.5...

36. It is easy to wash clothes in hot water because its

(a) Surface tension is more (b)  Surface tension is less (c) Consumes less soap (d) None of these Ans. (b)         ...

41. The normality of a solution of sodium hydroxide 100 mL of which contains 4 grams of NaOH is

a. 0.1 b. 40 c. 1.0 d. 0.4 Ans. c (12)

35. A 10 cm long wire is placed horizontally on the

A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up with a...

40. The amount of

K2 Cr2 O7 required to prepare 100 mL of its 0.05 N solution is a. 2. 9424 g b. 0.4904...

39. The volumes of 4 N HCl and 10 N HCl required to make 1 litre of 6 N HCl are

a. 0.75 litre of 10 N HCl  and 0.25 litre of 4 N HCl b. 0.25 litre of 4 N...

34. A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle θ with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

(a)    2πrT + W (b)  2πrT COSθ – W (c) 2πrT COSθ +W (d) W-2πrT COSθ Ans. c (12)

30. If 500 mL of a 5 M solution is diluted to 1500 mL, what will be the molarity of the solution obtained

a. 1.5 M b. 1.66 M c. 0.017 M d. 1.59 M Ans. b (9)

38. The concentration of

H2  O2  solution of ’10 volume’ is a. 30% b. 3% c. 1% d. 10% Ans. b (7)

33. Small liquid drops assume spherical shape because

(a)  Atmospheric pressure exerts a force on a liquid drop (b)  Volume of a spherical drop is minimum (c)   Gravitational...

37. A certain aqueous solution of

FeCl3   (formula mass = 162 )  has a density of 1.1 g/mL and contains 20.o% FeCl3 . Molar concentration of this...

36. Equal volumes of molar hydrochloric acid and sulphuric acid are neutralised by dilute NaOH solution and xkcal and ykcal of heat are liberated respectively. Which of the following is true

a.  x= y b. x = 2y c. x = 2y d. None of the above Ans. b (21)

32. Two pieces of glass plate one upon the other with a little water in between them cannot be separated easily because of

(a)  Inertia (b)  Pressure (c)   Surface tension (d)  Viscosity Ans. (c)  Surface tension pulls the plates towards each other. (7)

35. If 10 mL of 0.1 M aqueous solution of NaCl is divided into 1000 drops of equal volume. What will be the concentration of one drop

a. 0.01 M b. 0.10 M c. 0.001 M d. 0.0001 M Ans. b Explanation : Molarity is intrinsic property....

34. How many grams of concentrated nitric acid solution 70%

HNO3  should be used to prepare 250mL of 2.0 M HNO3 a. 53. 0 g conc. HNO3 b. 45.0 g...

33. In an experiment it showed that 10 mL of 0.05 M solution of chloride required 10mL of 0.1 M solution of

AgNO3   which of the following will be formula of the chloride (X stands for the symbol of the element other...

32. The density of a 3.60 M sulphuric acid solution that is 29%

H2 SO4  (Molar mass = 98 g mol -1   ) by mass will be a. 1.64 b. 1.88 c. 1.22 d....

31. If the concentration of glucose in blood is

0.9 g L-1  , what will be the molarity of glucose in blood a. 5 M b. 50 M c....

29. The molarity of pure water is

a. 55.6 b. 5.56 c. 100 d. 20.08 Ans. a Explanation : molarity of pure water = 1000/18 = 55.6...

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