Single correct option
Zinc granules react with dilute sulphuric acid to liberate
- A. oxygen gas
- B. sulphur dioxide
- C. carbon dioxide
- D. hydrogen gas
Show answer and solution
Answer: (D) hydrogen gas
Zinc is above hydrogen in the reactivity series, so it displaces hydrogen: Zn + H₂SO₄ → ZnSO₄ + H₂. The gas burns with a pop sound when a lighted splinter is brought near. Sulphur dioxide arises only with hot concentrated sulphuric acid, and no carbon is present, so carbon dioxide cannot form.
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