31) For being able to see three dimensional pictures we have to use
(A) A binocular
(B) A camera
(C) An epidiascope
(D) A stereoscope
32) Water has maximum density at
(A) 0°C
(B) 1°C
(C) 4°C
(D) 10°C
33) The theory of expanding universe was first propounded by
(A) Einstein
(B) Newton
(C) Galileo
(D) Hubble
34) An instrument used to detect purity of milk is
(A) Lactometer
(B) Hygrometer
(C) Manometer
(D) Sonometer
35) Consider the following statements: if there was no Capillarity
(1) It would be impossible to use a kerosene lamp
(2) One would not be able to use a straw to consume a soft drink
(3) The blotting paper would fail to function
(4) There would have been no plants on earth
Of the statements
(A) 1,2 and 3 are correct
(B) 2 and 4 are correct
(C) All are correct
(D) 1,3 and 4 are correct
36) Water vapour beyond the dew point result in
(A) Precipitation
(B) Hailstorm
(C) Condensation
(D) Formation of Ice
37) The main chemical substance present in teeth and bone of animal is
(A) Sodium Chloride
(B) Sugar
(C) Calcium Phosphate
(D) Calcium Sulphate
38) The major component of Honey is
(A) Glucose
(B) Sucrose
(C) Maltose
(D) Fructose
39) The working principle of washing machine is
(A) Centrifugation
(B) Dialysis
(C) Reverse Osmosis
(D) Diffusion
40) Radioactivity was first discovered by
(A) Pasteur
(B) Newton
(C) Watson
(D) Henri Becquerel