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Question

Amongst the following identify the species with an atom in + 6 oxidation state:



Your Answer
A

 MnO4-

Your Answer
B

 Cr(CN)63-

Your Answer
C

  NiF62-

Correct Answer
D

 CrO2Cl2


Solution

The correct option is D

 CrO2Cl2


In MnO4, Mn is in +7 oxidation state. 

Likewise, in Cr(CN)36 Chromium exhibits +3 oxidation state.

As for NiF26, Nickel shows +4 oxidation state.

What will be the oxidation number of Cr in CrO2Cl2?
We apply the rules for assigning oxidation number:
x42=0
Solving,x=+6

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