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Question

Sulphide ions react with $$Na_2[Fe(NO){(CN)}_5]$$ to form a purple colored compound $$Na_4[Fe{(CN)}_5(NOS)]$$.

In the reaction, the oxidation state of iron :


A
Changes from +2 to +3
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B
Changes from +3 to +2
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C
Changes from +2 to +4
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D
Does not change
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Solution

The correct option is D Does not change
Option (D) is correct.
The oxidation state of iron does not change.
$$Na_2S + Na_2
[Fe(CN)_5NO] \longrightarrow Na_4
[Fe(CN)_5NOS] (  complex   of  Purple  color)$$  

Chemistry

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