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Question

The oxidation number of Fe in K4[Fe(CN)6] and K3[Fe(CN)6] is respectively-

A
+2 in both
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B
+3 in both
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C
+2 and +3
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D
+3 and +2
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Solution

The correct option is A +2 and +3
K4[Fe(CN)6]
dissociates as
4K++[Fe(CN)6]4So,x+6(1)=4x=+2

K3[Fe(CN)6]

dissociates as
3K++[Fe(CN)6]3=x+6(1)=3x=+3

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