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JEE Main Chemistry question

ChemistryRedox ReactionsJEE Main

An acid solution of 0.2 mol of KReO was reduced with Zn and then titrated with 1.6 Eq of acidic KMnO solution. For the reoxidation of all the rhenium (Re) to the perrhenate ion (ReO), assuming that rhenium was the only element reduced, what is the oxidation state to which rhenium was reduced by Zn?

Answer: (C)

Solution

Equivalents of ReO reoxidised Eq, giving . Since Re starts at

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Question ID VK-130680