TNPSC Chemistry MCQ Questions and Answers - 3

Question: 11

Which of the following is a bleaching agent?

(A) Silver nitrate

(B) Copper sulphate

(C) Hydrogen peroxide

(D) Potassium chlorate

Question: 12

A powerful eye irritant present in smog is

(A) Sulphur dioxide

(B) Carbon dioxide

(C) Nitirc oxide

(D) Peroxyacetyl nitrate

Question: 13

Which one among the following not a greenhouse gas?

(A) Sulphur dioxide

(B) Chlrorofluorocarbon

(C) Methane

(D) Ozone

Question: 14

Pila globosa is used as biofilter in cleaning pollution of water by

(A) Arsenic

(B) Algal blooms

(C) Cadmium

(D) Mercury

Question: 15

Which of the following gases is lighter than air?

(A) Ammonia

(B) Chlorine

(C) Oxygen

(D) Carbon dioxide