TNPSC Chemistry Study Material in English Pdf - 1

Question: 1

Tetraethyl lead is used as

(A) Petrol additive

(B) Pain killer

(C) Fire extinguisher

(D) Mosquito repellent

Ans: A

Petrol additive

Question: 2

Which allotrope of carbon is in rigid three dimensional structure to

(A) Graphite

(B) Diamond

(C) Carbon Black

(D) Fullerene

Ans: B

Diamond

Question: 3

Which of the following chemically predominants in the silk fibres?

(A) Carbohydrate

(B) Complex lipid

(C) Mixture of polysaccharide and fat

(D) Protein

Ans: A

Carbohydrate

Question: 4

Sodium metal is kept under

(A) Alcohol

(B) Water

(C) Kerosene

(D) Petrol

Ans: C

Kerosene

Question: 5

Which of the following is the best conductor of electricity?

(A) Silver

(B) Mica

(C) Copper

(D) Zinc

Ans: A

Silver

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