MCQ practice · SSC Chemistry Board questions · Chapter 7: Chemical Reactions
Which ion can be oxidized?
Think it through first, then pick an option.
- a Na⁺
- b K⁺
- c Cu²⁺
- d Fe²⁺
Answer and explanation
Correct answer: d Fe²⁺
Fe²⁺ → Fe³⁺ + e⁻ is the book's example of oxidation.
Why the other options are wrong
- a Na⁺: Na⁺ cannot give up another electron, so it cannot be oxidized.
- b K⁺: K⁺ cannot give up another electron, so it cannot be oxidized.
- c Cu²⁺: Cu²⁺ takes electrons and is reduced, not oxidized.
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