Assistant Director Intelligence Bureau Paper 2018 Page-5

41) In a very low temperature which of the following will freeze at last?
(A) Sea Water

42) Nearest planet to earth is?
(A) Mercury
(B) Mars
(C) Venus
(D) None of these

43) During winter in cold countries, the ___ is mixed to melt the ice on the icy roads?
(A) Sugar
(B) Salt
(C) Sodium
(D) None of these

44) The average adult has a blood volume of about ___ litres?
(A) 4
(B) 5
(C) 6
(D) 7

45) Which of the following is true for 'sound'?
(A) Sound cannot travel through vacuum
(B) Sound can travel through vacuum
(C) Sound cannot travel through water
(D) Sound can travel through air

46) Long sight defect can be correct by using ___ lens
(A) concave
(B) convex
(C) Both A and B
(D) none of these

47) Very high frequency have ___ wavelengths?
(A) shorter
(B) longer
(C) medium
(D) none of these

48) For a fixed mass of gas at constant temperature, if we decrease volume, pressure will be?
(A) decrease
(B) increase
(C) remains constant
(D) none of these

49) Life span of red bloods cells is ___ days?
(A) 80
(B) 100
(C) 110
(D) 120

50) The sun is a ___
(A) star
(B) planet
(C) comet
(D) none of these





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