Question

A candle brought near the mouth of a jar containing hydrogen gas starts burning but is exinguished when pushed inside the jar​

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.

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Answer 2

Answer:

Because the burning requires the presence the oxygen which is not present inside the jar.

OR

Because hydrogen is explosive when mixed with air it burns with explosion near the mouth of gas jar but extinguished out inside the jar because the burning requires the presence of oxygen which is not presence inside the jar.

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