Top 10,000+ TNPSC General Science Gk Questions with Answers - 2

Question: 6

The sodium compound which is used for softening hard water is ___

(A) Bleaching powder

(B) Sodium bicarbonate

(C) Sodium chloride

(D) Sodium carbonate

Question: 7

The conversion of a liquid into vapour (gas) by heating is known as ___

(A) Freezing

(B) Condensation

(C) Evaporation

(D) Melting

Question: 8

The substance used for the softening of hard water is ___

(A) Copper sulphate

(B) Sodium carbonate

(C) Sodium chloride

(D) Sodium hydroxide

Question: 9

Hydrogen and oxygen in water exist in the ratio ___

(A) 1:2

(B) 2:1

(C) 1:8

(D) 8:1

Question: 10

The matter that occupies a definite space, has a definite mass but no definite shape is called ___

(A) Gas

(B) Liquid

(C) Matter

(D) Solid