which has is usually liberated when an acid reacts with a metal ? How will you test for the presence of this gas ?
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Question:
which has is usually liberated when an acid reacts with a metal ? How will you test for the presence of this gas ?
Answer:
• When acid reacts with metal, hydrogen gas is evolved
• When we bring a burning match stick or candle to the mouth of the delivery tube, it produces a pop sound
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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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