Question

8. A pop sound is heard when a lighted match stick
is brought near the mouth of a jar. This indicates
the release of
(a) oxygen gas
(b) hydrogen gas
(c) nitrogen gas (d) water vapour​

Answer 1

Answer:

a Oxygen gas

Explanation:

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Answer 2

Answer:

hydrogen gas

Explanation:

hydrogen gas produces a pop sound when burnt.

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