Which has maximum oxidation number ?
Correct answer: D. Mn
- A. N
- B. Cr
- C. S
- D. Mn
Explanation
The highest common oxidation number listed is Mn(+7), as in permanganate, while N commonly reaches +5 and Cr and S commonly reach +6. Students may select Cr or S because +6 is high, but they overlook manganese's +7 state.
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About Oxidation and Reduction
Oxidation involves loss of electrons, increase in oxidation number or addition of oxygen, while reduction involves electron gain, decrease in oxidation number or removal of oxygen. The topic covers oxidising and reducing agents, oxidation-number changes, redox equations and the distinction between oxidation at the anode and reduction at the cathode.
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