Question

which gas is usually liberated when an acid reacts with a metal ? illustration with an example.how will you test for the presence of this gas​

Answer 1

Explanation:

mostly H2 gas is liberated ex:-

Mg + H2SO4 ---> Mg(SO4)2 + H2

to check its presence we put a matchstick at the mouth of the test tube and we'll see that the matchstick burns with a pop sound

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Answer 2

HEY FRIEND HERE IS UR ANSWER ,

When an acid react with a metal it liberates hydrogen gas.

     E.g., Zn(s) + 2HCl(aq) ZnCl2 (aq) + H2(g)

To test the presence of H2 gas, bring a burning splinter near the mouth of the test tube where H2 gas is released, the match stick bums with a pop sound.

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