MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
In Mg + ZnSO₄ → MgSO₄ + Zn, which is oxidized?
Think it through first, then pick an option.
- a Zn²⁺
- b SO₄²⁻
- c Zn
- d Mg
Answer and explanation
Correct answer: d Mg
Mg gives two electrons to become Mg²⁺ (in MgSO₄), so it is oxidized.
Why the other options are wrong
- a Zn²⁺: Zn²⁺ takes electrons to become Zn, so it is reduced.
- b SO₄²⁻: SO₄²⁻ is unchanged on both sides, so it is a spectator, not oxidized.
- c Zn: Zn is a product formed by reducing Zn²⁺.
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