Which of following gas is combustible?

مندرجہ ذیل میں سے کون سا آتش گیر ہے؟

Hydrogen

Nitrogen

Oxygen

None of these

Explanation

Straw, camphor, alcohol, petrol, diesel etc. catch fire easily to release heat energy and light energy.

So, these are examples of combustible substances.

Examples of combustible gases are Hydrogen, Methane, Propane, Iso-butane. Mixture of a certain amount of combustible gas and Oxygen will explode in the presence of an ignition source.