Which gas is generally liberated when an acid reacts with a metal? Illustrate with a suitable ex. How will you identify and test for the presence of this gas?

Answers

Question :

Which gas is generally liberated when an acid reacts with a metal? Illustrate with a suitable ex. How will you identify and test for the presence of this gas?Submitted on 28/8/2024 | Answered by Vandana Rana

Answer :

Hydrogen gas is liberated when an acid reacts with a metal.
For example: Take some pieces of zinc granules in a test tube and add H₂SO₄ to it.
Shake it and pass the gas evolved into a soap solution.
Bubbles are formed in the soap solution.
These soap bubbles contain hydrogen gas
. The chemical equation of the reaction is: H₂SO₄+ Zn → ZnSO₄+ H₂↑
Test to Identification -
Hydrogen gas is identified by bringing a burning candle near the soapy bubbles.
The candle will burn with a pop sound.