Assertion :In titrations involving potassium permanganate no indicator is used . Reason: $M n O_{4}^{-}$ acts as the self - indicator.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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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
$K M n O_{4}$ or ${M n O}_{4}^{-}$ acts as its own indicator so during titrations involving $K M n O_{4}$ no indicator is added from outside. $K M n O_{4}$ is dark purple in $+ 7$ oxidation state and on reaching end point its color changes to pale pink color.
Therefore, Assertion and reason both statements are correct with reason being explaining assertion.

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