Question

Name the gas that liberates when an acid reacts with a metal

Answer 1

It depends on activity series and acid.

If Na/K/Mg/Al/ etc reacts with HCl then Hydrogen gas is liberated.

But when Cu/Ag/Au/Pt reacts with HCl then no reaction occurs as these are less active metals then hydrogen.

So first remember the activity series.

Thanks.
Tripathy

Answer 2

when acid react with metal hydrogen gas will be liberated .

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