Question

The gas present in the air which helps in burning is

• A. Oxygen
• B. Nitrogen
• C. Carbon dioxide
• D. None of these

Answer 1

The correct option is A

Oxygen

Explanation:

(a) Oxygen

• 21% of air consists of Oxygen. It supports combustion or burning.
• The process in which fuels combine with Oxygen forms Carbon dioxide and releases heat and light is called combustion reaction.
• Example: Carbon reacts with oxygen to form carbon dioxide along with heat and light.

$\underset{\mathrm{Carbon}}{\mathrm{C}}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2}\to \underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2}+\mathrm{Heat}+\mathrm{Light}$

Hence, the correct option is (a) as Oxygen is the gas present in the air that helps in burning.