Question

When $KMnO_{4}$ reacts with acidified $FeSO_{4}$.

• A. Only $FeSO_{4}$ is oxidized
• B. Only $KMnO_{4}$ is oxidized
• C. $FeSO_{4}$ is oxidised $KMnO_{4}$ and is reduced
• D. None of these

Answer 1

Answer: (C)

$FeSO_{4}$ is oxidised $KMnO_{4}$ and is reduced

Answer 2

$FeSO_{4}$is oxidised and $KMnO_{4}$ is reduced.

$\lbrack 2FeSO_{4} + H_{2}SO_{4} \rightarrow Fe_{2}(SO_{4})_{3} + 2H\rbrack \times 5$

$\lbrack 2H + \lbrack O\rbrack \rightarrow H_{2}O\rbrack \times 5$

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$2KMnO_{4} + 8H_{2}SO_{4} + 10FeSO_{4} \rightarrow$

$K_{2}SO_{4} + 2MnSO_{4} + 5Fe_{2}(SO_{4})_{3} + 8H_{2}O$

In this reaction oxidation state of $Mn$ is changing from +7 to +2 while oxidation state of $Fe$ is changing from +2 to +3.