MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
Which is a reducing agent?
Think it through first, then pick an option.
- a Fe³⁺
- b Cu²⁺
- c Zn²⁺
- d Pb²⁺
Answer and explanation
Correct answer: d Pb²⁺
Pb²⁺ can give two more electrons to become Pb⁴⁺, so it is a reductant.
Why the other options are wrong
- a Fe³⁺: Fe³⁺ only takes electrons to become Fe²⁺, so it is an oxidant.
- b Cu²⁺: Cu²⁺ takes an electron to become Cu⁺, so it is an oxidant.
- c Zn²⁺: Zn²⁺ gives up no more electrons, so it is not a reductant.
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