Who invented the television?
(A) Niels Bohr
(B) J. Ale. Baird
(C) Alexander Fleming
(D) Village Well
Insulin was invented by?
(A) Eijkman
(B) Betting
(C) Domagk
(D) H. G. khurana
Filling helium in balloons is considered more useful than hydrogen, because?
(A) it is cheap
(B) less heavy
(C) more flying ability
(D) it does not form explosive mixture with air
Which acid is used in making battery?
(A) sulfuric acid
(B) nitric acid
(C) hydrochloric acid
(D) acetic acid
Which substance is added to make natural rubber hard and bouncy?
(A) Petrol Jelly
(B) sulfuric acid
(C) sulfur
(D) Sponge
Gun powder is a mixture of?
(A) soil and TNT
(B) sulphur, clay and charcoal
(C) saltpeter, sulfur and charcoal
(D) TNT and charcoal
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