Question

practical to identify the gas evolved action of metal with acid​

Answer 1

Answer:

just bring a burning matchstick in contact with that gas. Gas will start burning.

Answer 2

Explanation: Actually when the metal reacts with acid the evolved gas is Hydrogen (H).

The presence of the gas can be predicted by bringing a lighted matchstick near the test tube in which the reaction is going .

The pop -up sound will assure that the evolved gas is hydrogen.

Thanks.