MCQ
Equivalent weight of KMnO4 MCQ - Practice Questions with Answers
Solve 1 Equivalent weight of KMnO4 questions for RAS/RPSC preparation.
Practice questions
Q1In an alkaline medium, the equivalent weight of KMnO4 is:
Explanation
In an alkaline medium, permanganate ion is reduced from manganese in the +7 oxidation state to manganese dioxide, where manganese is +4. The change in oxidation number is 3, so the n-factor of KMnO4 is 3. Equivalent weight equals molar mass divided by n-factor; with molar mass about 158, this gives M/3, or 52.66. M/5 applies to acidic medium, where permanganate is reduced to Mn2+. M/6 has no role in this standard reaction. M would mean n-factor 1, which is not the alkaline reduction.
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