1000+ TNPSC Chemistry Study Materials Pdf - 2

Question: 6

Most poisonous pollutants in water is

(A) Arsenic

(B) Detergent

(C) Zinc

(D) Phosphate

Question: 7

Which one of the following was used as a chemical weapon in the first world war?

(A) Water gas

(B) Mustard gas

(C) Hydrogen cyanide

(D) Carbon monoxide

Question: 8

The vitamin that is most readily manufactured in our bodies is

(A) Vitamin A

(B) Vitamin B

(C) Vitamin C

(D) Vitamin D

Question: 9

The isotopes of chlorine with mass number 35 and 37 exist in the ratio of

(A) 1 : 2

(B) 2 : 3

(C) 3 : 1

(D) 3 : 4

Question: 10

The law of constant proportions was enunciated by

(A) Avogadro

(B) Berthelot

(C) Dalton

(D) Proust