Question

Which gas is usually liberate when acid react with metal and illustrate with ex and how the presence of gas test?

Answer 1

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Answer 2

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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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