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Question

Among the following, the species in which the oxidation number of an element is +6 is :

A
MnO4
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B
Cr(CN)36
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C
NiF26
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D
CrO2Cl2
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Solution

The correct option is D CrO2Cl2
The oxidation number of manganese in MnO4 is 7.
The oxidation number of chromium in Cr(CN)36 is +3.
The oxidation number of nickel in NiF26 is +4.
The oxidation number of chromium in CrO2Cl2 is +6.
Hence, the species in which an element has oxidation number +6 is CrO2Cl2.

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