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Question

Assertion :In the reaction between potassium permanganate and potassium iodide, permanganate ions act as oxidizing agent. Reason: Oxidation state of manganese changes from +2 to +7 during the reaction.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2KMnO4+2KI2MnO2+I2+4KO
Oxidation state of Mn in 2KMnO4is 2+2x16=0
x=9
Oxidation state of Mn in 2MnO2 is 2x8=0
x=4
The decrease of oxidation state indicates that Mn is oxidising agent

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