Question

Which gas is usually liberated when an acid reacts with a metal illustrate with an example .How will u test for the presence of this gas?

Answer 1

When acid reacts with metal , hydrogen gas is being liberated.

For example

2Na + 2HCl = 2Nacl + H2

Here h2 gas is being liberated

When we bring cander or fire splinter near the mouth of test tube having acid and metal, it burns with pop sound. This concludes the prensence of h2 gas.

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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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