General Science • ChemistryMedium
Which of the following gases is liberated when dilute hydrochloric acid reacts with active metals like zinc?
A. Oxygen
B. Nitrogen
C. Hydrogen✓ Correct Answer
D. Carbon dioxide
💡 Solution & Explanation
When an active metal such as zinc reacts with a dilute mineral acid like hydrochloric acid, a single displacement reaction occurs, producing a metal salt and releasing hydrogen gas. Hydrogen gas burns with a pop sound when a burning splinter is brought near it. Zinc chloride is formed alongside the gas in this reaction.
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