MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
Which is a reducing agent?
Think it through first, then pick an option.
- a Fe²⁺
- b Mg²⁺
- c Zn²⁺
- d Cu²⁺
Answer and explanation
Correct answer: a Fe²⁺
Fe²⁺ can give one more electron to become Fe³⁺, so it is a reductant.
Why the other options are wrong
- b Mg²⁺: Mg²⁺ gives up no more electrons, so it is not a reductant.
- c Zn²⁺: Zn²⁺ gives up no more electrons, so it is not a reductant.
- d Cu²⁺: Cu²⁺ takes an electron to become Cu⁺ (the book's example), so it is an oxidant.
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