Question

In reaction formation of hydrogen gas is indicated by which sound​

Answer 1

Answer:

pop

Heat causes gases to expand, and since a lot of heat is released the gaseous mixture (hydrogen, oxygen remaining from and water vapour liberated from the reaction) and the air adjacent to it expand very quickly, so quickly that the gas molecules break the sound barrier. That is the “pop” sound that you are hearing.

Answer 2

Explanation:

Heat causes gases to expand, and since a lot of heat is released the gaseous mixture (hydrogen, oxygen remaining from and water vapour liberated from the reaction) and the air adjacent to it expand very quickly, so quickly that the gas molecules break the sound barrier. That is the “pop” sound that you are hearing.