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Question

In a volumetric experiment, it was found that a solution of KMnO4 is reduced to MnSO4. If the normality of solution is 1 N, then molarity of solution will be:

A
0.5 M
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B
0.2 M
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C
1 M
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D
0.4 M
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Solution

The correct option is B 0.2 M
Normality=Molarity× Change in oxidation number
+7KMnO4+2MbSO4
Change in oxidation number =5
N=M×5
1=M×5
M=0.2.

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