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Question

How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal? [2 MARKS]

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Solution

Explanation: 2 Marks

Hydrogen gas is evolved when hydrochloric acid reacts with an active metal such as sodium, potassium, calcium or magnesium.

Example-Mg(s)+2HCl(aq)MgCl2(aq)+H2(g)

In order to test the gas, bring either a burning match stick or candle near the gas.Then gas will immediately catch fire.


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