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Question

The oxidation number of Mn is +8 in the compound:
  1. K2MnO4
  2. MnO4
  3. KMnO4
  4. Mn2O7

A
MnO4
B
Mn2O7
C
K2MnO4
D
KMnO4
Solution
Verified by Toppr

In MnO4 manganese oxidation number is +8.
Oxidation number of oxygen is 2. MnO4 is neutral molecule so total oxidation number of molecule is zero.
Oxidation number of Mn+4(2)=0
Oxidation number of Mn=+8.
So answer is B.

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