pBlock ElementsII 1 Question 21
21. Which of the following is not oxidised by $\mathrm{O} _{3}$ ?
$(2005,1 \mathrm{M})$
(a) KI
(b) $\mathrm{FeSO} _{4}$
(c) $\mathrm{KMnO} _{4}$
(d) $\mathrm{K} _{2} \mathrm{MnO} _{4}$
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Answer:
Correct Answer: 21. (c)
Solution:
- In $\mathrm{KMnO} _{4}, \mathrm{Mn}$ is already in its highest oxidation state (+7), cannot be oxidised by any oxidising agent.
