MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
SnCl₂ + 2FeCl₃ → 2FeCl₂ + SnCl₄. In the reaction in the stem-
- i. Fe³⁺ is reduced
- ii. Cl⁻ is a spectator ion
- iii. Sn²⁺ is oxidized
Think it through first, then pick an option.
- a i and ii
- b ii and iii
- c i and iii
- d i, ii and iii
Answer and explanation
Correct answer: d i, ii and iii
Fe³⁺ is reduced, Sn²⁺ oxidized, and Cl⁻ unchanged, a spectator ion.
Why the other options are wrong
- a i and ii: iii is also true: Sn²⁺ rises to Sn⁴⁺, so it is oxidized.
- b ii and iii: i is left out: Fe³⁺ takes an electron to become Fe²⁺, so it is reduced.
- c i and iii: ii is left out: Cl⁻ is Cl⁻ on both sides and takes no part, so it is a spectator ion.
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