In a basic medium, $H_{2} O_{2}$ exhibits which of the following reactions?
A. $M n^{2 +} \to M n^{4 +}$
B. $I_{2} \to I^{-}$
C. $P b S \to P b S O_{4}$

(A), (C) only

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(A) only

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(B) only

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(A), (B) only

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Solution

The correct option is D (A), (B) only
In basic medium, oxidising action of $H_{2} O_{2}$ .
$M n^{2 +} + H_{2} O_{2} \to M n^{+ 4} + 2 O H^{-}$

In basic medium, reducing action of $H_{2} O_{2}$ .
$I_{2} + H_{2} O_{2} + 2 O H^{-} \to 2 I^{-} + 2 H_{2} O + O_{2}$

In acidic medium, oxidising action of $H_{2} O_{2}$ .
$P b S (s) + 4 H_{2} O_{2} (a q) \to P b S O_{4} (s) + 4 H_{2} O (l)$

Hence, option (d) is correct.

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Similar questions

Which of the following reaction shows the reduction reaction of $H_{2}$ $O_{2}$ ?

P b S + H_{2} O_{2} \to P b S O_{4} + H_{2} O

P b S + H_{2} O_{2} \to P b S O_{4} + H_{2} O

P b S + H_{2} O_{2} \to P b S O_{4} + H_{2} O

I_{2}

H_{2} O_{2}

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