TRB Model Question Papers with Answer in Chemistry - 3

Question: 11

Bio-gas mainly consists of

(A) Hydrogen and oxygen

(B) Carbon dioxide and methane

(C) Hydrogen and methane

(D) Carbon dioxide and hydrogen

Question: 12

Sodium carbonate is manufactured by

(A) Lead chamber process

(B) Contact process

(C) Haber’s process

(D) Solvay process

Question: 13

Permanent hardness of water can be removed by adding

(A) Bleaching powder

(B) Washing soda

(C) Chlorine

(D) Potassium permanganate

Question: 14

Which of the following gas is used to extinguish fire?

(A) Neon

(B) Nitrogen

(C) Carbon monoxide

(D) Carbon dioxide

Question: 15

Anhydrous sodium carbonate is otherwise called as

(A) Soda lime

(B) Washing soda

(C) Baking soda

(D) Soda ash