Q.

The brown complex [Fe(H2O)5(NO)]2+ formed by FeSO4 in the test of NO3− ion has Fe in oxidation state

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a

zero

b

+1

c

+2

d

+3

answer is B.

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Detailed Solution

NO3−+5+3Fe2++4H+→ 3Fe3++2H2O+NO+2FeH2O62++NO→ Fe+H2O5NO+Brown complex+H2O
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The brown complex [Fe(H2O)5(NO)]2+ formed by FeSO4 in the test of NO3− ion has Fe in oxidation state