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Which of the following arrangements repr...

Which of the following arrangements represent increaseing oxidation number of the central atom?

A

`CrO_(2)^(-), ClO_(4)^(-),CrO_(4)^(2-),MnO_(4)^(-)`

B

`ClO_(4)^(-),CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-)`

C

`CrO_(2)^(-), ClO_(4)^(-),MnO_(4)^(-),CrO_(4)^(2-)`

D

`CrO_(2)^(-),MnO_(4)^(-),CrO_(4)^(2-),ClO_(4)^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
Writign the oxidation number (O.N.) of Cr, Cl and Mn on each species in the four set of ions, then
(a) `CrO_(2)^(-), ClO_(4)^(-),CrO_(4)^(2-),MnO_(4)^(-)``" "`(b)`ClO_(4)^(-),CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-)`
( c) `CrO_(2)^(-), ClO_(4)^(-),MnO_(4)^(-),CrO_(4)^(2-)``" "`(d) `CrO_(2)^(-),MnO_(4)^(-),CrO_(4)^(2-),ClO_(4)^(-)`
Only in the arrangement (a), the O.N. of central atom increases from left to right therefore, option (a) is correct
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