Question

What happens when burning candle is
brought near the gen?​

Answer 1

When a lighted candle is brought near the mouth of the jar containing hydrogen gas, a pop sound is heard and the flame of the candle is extinguished. And when the lighted candle is brought near the mouth of a jar containing carbon dioxide gas the flame of the candle extinguish without making any sound.

Answer 2

When a burning candle is brought near hydrogen

a Pop sound is heard and the flame is extinguished.