Which of the following statements is corrected about equivalent weight of `KMnO_(4)`?
A
It is one third of its molecular weightin alkaline
B
It is one fifth of its molecular weight in alkaline medium
C
It is equal to its molecular weight in acidic medium
D
It is one third of its molecular weight in acidic medium
Text Solution
Verified by Experts
The correct Answer is:
A
It is one-third of its molecular weight in alkaline medium because it gives 3 nascent oxygen in alkaline medium. `2KMnO_(4) + H_(2) O overset(+3 e^(-))rarr 2KOH + 2MnO_(2) + 3 [O]` `:.` Equivalent weight `= (M)/(3)`
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A2Z-THE D AND F BLOCK ELEMENTS-KMnO_4 And K_2Cr_2O_40
