Chemistry MCQs

Question 1

The metal that is used as a catalyst in the hydrogenation of oils is

Accepted Answer

Ni

Answer

Pb

Answer

Cu

Answer

Pt

Question 2

The most abundant rare gas in the atmosphere is

Accepted Answer

Ar

Answer

He

Answer

Ne

Answer

Xe

Question 3

The Latin word formica means ant. The name formic acid is derived from this Latin word because

Accepted Answer

this acid was first obtained by the distillation of ants

Answer

this acid, in ancient times, was used to eliminate ant-hills

Answer

this corrosive acid is secreted by ants to drive away their enemies

Answer

ants are attracted by the odour of this acid

Question 4

The ore which is found in abundance in India is

Accepted Answer

monazite

Answer

fluorspar

Answer

bauxite

Answer

magnetite

Question 5

The inherited traits of an organism are controlled by

Accepted Answer

DNA molecules

Answer

RNA molecules

Answer

nucleotides

Answer

enzymes

Question 6

The heat energy produced when the human body metabolises 1 gram of fat is

Accepted Answer

39 KJ

Answer

30 KJ

Answer

1 KJ

Answer

29 KJ

Question 7

What are the number of moles of CO2 which contains 16 g of oxygen?

Accepted Answer

0.5 mole

Answer

0.2 mole

Answer

0.4 mole

Answer

0.25 mole

Question 8

The main use of salt in the diet is to

Accepted Answer

produce in small amounts the hydrochloric acid required for the digestion of food

Answer

make the taste of food better

Answer

ease the process of cooking

Answer

increase the solubility of food particles in water

Question 9

The monomer of polythene is

Accepted Answer

ethylene

Answer

vinyl chloride

Answer

ethyl alcohol

Answer

None of the above