SATHEE: Transition and InnerTransition Elements

Transition and InnerTransition Elements - Result Question 44

####45. Reduction of the metal centre in aqueous permanganate ion involves

(2011)

(a) three electrons in neutral medium

(b) five electrons in neutral medium

(d) five electrons in acidic medium

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Answer:

Correct Answer: 45. $(a, c, d)$

Solution:

In neutral medium

$M n O_{4}^{-} \to M n O_{2} (M n^{7 +} + 3 e^{-} \to M n^{4 +})$

In alkaline medium

$M n O_{4}^{-} \to M n O_{2} (M n^{7 +} + 3 e^{-} \to M n^{4 +})$

In acidic medium

$M n O_{4}^{-} \to M n^{2 +} (M n^{7 +} + 5 e^{-} \to M n^{2 +})$

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Transition and InnerTransition Elements - Result Question 44

Answer:

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