which gas is usually liberate 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 reacts with metal hydrogen gas is liberated
Ex= 2NaOH + Zn - Na2ZnO2 + h2
When we bring a lighted matchstick near to the gas it burns with pop up sound this sound shows the presence of hydrogen gas
Explanation:
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