Question

observe, in which of the following glass candle will burn for a longer period. (filled with hydrogen, filled with oxygen, filled with water, vacuum)

Answer 1

Filled with oxygen because of oxygen is the supporter of fire and it can be burnt for the longest time I hope it my answer Will help you

Answer 2

" Filled with oxygen "

We know that in vacuum thier is not supported of combustion, so no burning.

Similarly, in all except oxygen all don't support combustion. so here oxygen helps it.