The velocity of sound is minimum in?
(A) Air
(B) Iron
(C) Vacuum
(D) Water
How many bones are present in human ears?
(A) 6
(B) 9
(C) 4
(D) 10
The weight of our body is mostly made of?
(A) From Water
(B) Parts of Skin
(C) From Bones
(D) Parts of Body
Which of the following substance is used for Artificial Rain?
(A) Silver Iodide
(B) All of the Above
(C) Silver Bromide
(D) Ammonium Nitrate
Bronze is an alloy of?
(A) Copper & Lead
(B) Copper & Tin
(C) Copper & Silver
(D) Copper & Zinc
Who invented the rabies vaccine?
(A) Hanfree Davy
(B) Charles Darwin
(C) Lewis Pasteur
(D) none of these
The rotations per second of a wheel that spins at an accelerating rate are measured by
(A) Chronometer
(B) hydrometer
(C) calipers
(D) stroboscope
Radio waves are reflected from which part of the atmosphere-
(A) Ionosphere
(B) Stratosphere
(C) Mesosphere
(D) None of these
When was the Space Commission established in India?
(A) July 1972
(B) July 1973
(C) June 1972
(D) June 1973
Which one of the following metal is used with iron to make it rust free?
(A) Chromium
(B) Tin
(C) Alluminium
(D) Carbon
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