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The oxidation number of Cr is +6 in...

The oxidation number of Cr is +6 in

A

`FeCr_(2)O_4`

B

`KCrO_3Cl`

C

`CrO_3`

D

`[Cr(OH_4)]^(-)`

Text Solution

Verified by Experts

The correct Answer is:
B, C
Consider the oxidation state of .Cr. as .x.
b) `KCrO_(3)Cl implies 1 + x +3 (-2)+(-1)=0`
`1 +x -6 -1=0 implies x =6`
c) ` CrO_5 rarr`
`CrO_(5)=Cr(O)(O)_4`
`implies x +(-2) +4(-1)=0`
`implies x-2 -4 =0 implies x -6 =0 implies x +6`
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