Basic Science Questions for Competitive Exam

Basic Science Questions with Answers

Q.36 Heavy water is

(A) deuterium oxide

(B) PH7

(C) rain water

(D) tritium oxide

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Q.37 The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of

(A) bromine

(B) fluorine

(C) chlorine

(D) sulphur

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Q.38 The element common to all acids is

(A) hydrogen

(B) carbon

(C) sulphur

(D) oxygen

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Q.39 Non stick cooking utensils are coated with

(A) Teflon

(B) PVC

(C) black paint

(D) polystyrene

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Q.40 Monazite is an ore of

(A) titanium

(B) zirconium

(C) iron

(D) thorium

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Q.41 Carbon, diamond and graphite are together called

(A) allotropes

(B) isomers

(C) isomorphs

(D) isotopes

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