Chemistry MCQs

Question 1

Dry ice is

Accepted Answer

Solid carbon dioxide

Answer

Solid ammonia

Answer

Solid sulphur dioxide

Answer

Dry carbon dioxide gas

Question 2

Which of the following gases is present under pressure in soft drinks?

Accepted Answer

Carbon dioxide

Answer

Oxygen

Answer

Nitrogen

Answer

Nitrous oxide

Question 3

If we burn graphite,

Accepted Answer

No residue will be left

Answer

Residue will be left

Answer

It will not burn

Answer

It will change into diamond

Question 4

Lead pencil contains

Accepted Answer

Graphite

Answer

Lead

Answer

Ferrous sulphide

Answer

Lead sulphide

Question 5

Highest percentage of carbon is found in which form of coal?

Accepted Answer

Anthracite

Answer

Bituminous

Answer

Peat

Answer

Lignite

Question 6

The main source of carbon monoxide is

Accepted Answer

Transportation

Answer

Industrial process

Answer

Fuel combustion

Answer

Solid waste disposal

Question 7

Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

Accepted Answer

CO

Answer

CO2

Answer

O3

Answer

All of these

Question 8

Water gas is the combination of

Accepted Answer

CO and H2

Answer

CO2and H2

Answer

CO and H2O

Answer

CO2 and CO

Question 9

The gas that causes suffocation and death when coal or coke is burnt in a closed room is

Accepted Answer

Carbon monoxide

Answer

Methane

Answer

Ethane

Answer

Carbon dioxide