Here's why:
* Combustibility: Hydrogen is highly flammable and reacts explosively with oxygen.
* Rapid Combustion: When hydrogen is mixed with air and ignited, the reaction happens very quickly, creating a sudden increase in pressure and volume. This rapid expansion of gas is what causes the squeaky pop sound.
Important Note: This test should only be performed under controlled conditions and with proper safety precautions. Working with hydrogen gas is dangerous and requires specialized equipment and knowledge.
