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Q.

Sulphide ions react with Na2[Fe(NO)(CN)5] to form a compound, Na4[Fe(CN)5(NOS)]. In the reaction, the oxidation state of iron is

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a

changes from +3  to +2

b

changes from +2  to +4

c

does not change

d

changes from +2  to +3

answer is D.

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Detailed Solution

The oxidation state of iron does not change.

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