Question

what happens when acids react with metals how can you confirm the presence of gas which has produced after the reaction​

Answer 1

Answer:

The gas released after reaction is H2 gas and this passed out through a tube into the soap water and bubbles comes out. When we bring a incense stick near the bubble it puts up with a pop sound. This tells us the gas is H2.

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Answer 2

Metals below hydrogen on the reactivity series will not react with dilute acids. The hydrogen pop test can be used to confirm that a chemical reaction has taken place between an acid and a metal – a lit splint will “pop” if placed in the presence of hydrogen gas.