Question

what happen if a lighted candle is brought near the mouth of the jar containing hydrogen gas and carbon dioxide gas

Answer 1

it will not burnt.because there is no oxygen.

Answer 2

When lighted candle is brought near jar containing

1. hydrogen gas- The candle will extinguish as hyrogen doesnot support combustion.Also, it will burn with a pop sound.

2. in case of carbondioxide-the candle will simply extinguish.