Question

Why when testing for hydrogen, does it release a squeaky pop?

Answer 1

When you have hydrogen gas trapped in a container, you can place a lit match near it and it will make a characteristic “squeaky pop” sound as it reacts with the flame

Answer 2

hydrogen is a very combustible gas when we pass it through a soap solution it produces hydrogen bubbles. When candle is placed near them it makes combustion and sounds POP!