Question

a candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed in side the jar ,why?

Answer 1

A candle when brought near the mouth of the jar containing hydrogen gas starts burning but the candle is extinguished when pushed inside the jar because, Because hydrogen is a combustible gas but a non-supporter of combustion i.e. it burns itself but does not allow substances to burn in it.

Answer 2

Explanation:

Hydrogen is a combustible gas but it does not support the combustion process. When the candle is brought near the mouth of a jar containing Hydrogen with the help of Oxygen in the atmosphere. When pushing the candle inside the jar oxygen supply gets cut off hence the fire gets extinguished