TNPSC Group 4 Chemistry Model Question Paper 2019-2020 - 3

Question: 11

The catalyst used in the hydrogenation process of the oils is

(A) Fe

(B) Ni

(C) Mo

(D) Pt

Question: 12

In which one of the following situations a chemical reaction does not occur?

(A) Iron is kept in moist air

(B) Sodium is placed in water

(C) Coal is burnt in air

(D) Common salt is exposed to air

Question: 13

Itching due to insect bite is caused by

(A) Acetic acid

(B) Malefic acid

(C) Lactic acid

(D) Malefic acid

Question: 14

Which one among the following can produce light by a chemical change?

(A) Lighting and thunder

(B) Electric bulb

(C) Sun

(D) Moon

Question: 15

The essential element in all organic compounds is

(A) Chlorine

(B) Carbon

(C) Sulphur

(D) Nitrogen