TNPSC Chemistry Previous Old Year Question Papers - 2

Question: 6

Supersonic aircrafts discharge the following substance into the stratosphere

(A) CO

(B) SO

(C) NO

(D) H

Question: 7

Which of the following is obtained by the reaction of benzene and chlorine in the presence of catalyst?

(A) Benzene hexachloride

(B) Chloro benzene

(C) Benzoyl chloride

(D) Benzyle chloride

Question: 8

Radon is a

(A) Trade name of nylon

(B) Explosive

(C) Drug

(D) Noble gas

Question: 9

The ratio of pure gold in 18 carat gold is

(A) 60%

(B) 75%

(C) 80%

(D) 100%

Question: 10

The gas is commonly used in anaesthesia

(A) Hydrogen peroxide

(B) Nitrous oxide

(C) Methane

(D) Nitrogen