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Question

Assertion
KMnO4 acts as an oxidising agent is acidic, basic medium.

Reason
KMnO4 oxidises ferrous sulphate to ferric sulphate.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
KMnO4 acts as oxidising agent in acidic medium as its oxidation state change from +7 to +2 while in basic medium its oxidation state changes from +7 to +4.
KMnO4 oxidises Ferrous sulphate (Fe=+2) to Ferric sulphate (Fe=+3)
5Fe2++MnO4+8H+Mn2++4H2O+5Fe3+
Hence, both assertion and reason are correct but reason is not correct explanation of assertion.

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