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Question
How will you test for the gas which is liberated when hydrochloric acid reacts with an active metal?
Solution
Hydrogen gas is liberated when an active metal reacts with hydrochloric acid.
For testing the presence of hydrogen gas, bring a burning candle near the mouth of the test tube in which the reaction is taking place. If the gas burns with a popping sound, then it can be concluded that it is hydrogen.
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