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Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas? |
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Answer» When an acid react with a metal, it liberates hydrogen gas. For example: 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 splinter burns with a pop sound. Hydrogen gas is usually liberated when an acid reacts with metal . Eg . Na (s) + HCL(aq) ----> NaCl (aq) + H2 (g) |
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