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Question

In which of the following compounds, the oxidation state I atom is highest?

A
KI3
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B
KIO4
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C
KIO3
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D
IF5
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Solution

The correct option is B KIO4
(a) KI3
Oxidation state of K=+1
Let, the oxidation state of I be x
1+3x=03x=1x=13
(b) KIO4
Oxidation state of K=+1
Oxidation state of O=2
Let, the oxidation state of I be x
+1+x+(2×4)=01+x8=0x=+7
(c) KIO3
Oxidation state of K=+1
Oxidation state of O=2
Let, the oxidation state of I be x
+1+x+(2×3)=01+x6=0x=+5
(d) IF5
Oxidation state of F=1
Let, the oxidation state of I be x
x+(1×5)=0
​​​​​​​I=+5

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