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2 marksDifficulty: Easy
Name the gas evolved when dilute hydrochloric acid reacts with zinc, and state how it is identified.
Original Khojo Papers practice question — not from a past board paper.
Answer
Hydrogen gas is evolved. It is identified because it burns with a pop sound when a lighted splint is brought near the mouth of the test tube.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Zn + 2HCl → ZnCl2 + H2
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