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Q.

The correct IUPAC name of the coordination compound K3|Fe(CN)5NO| is

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a

Potassium nitritopentacyanoferrate (III)

b

Potassium pentacyanonitrosylferrate (II)

c

Potassium pentacyanonitroferrate (II)

d

Potassium nitritepentacynanoiron (II)

answer is C.

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Detailed Solution

If we consider the question, the IUPAC name of K₃[Fe(CN)₅NO] would be Potassium penta cyano nitrito −N− ferrate (III).
The nitrile or the −CN group becomes Cyano when it is present in the negative ion part of a coordination compound.
Here in case of K₃[Fe(CN)₅NO], the coordination sphere is negative so the −NO part also becomes nitro, while naming.
The word root -pent, represents five, as five cyano groups are present in the coordination sphere and the oxidation state of the iron, or the central metal is always mentioned in the brackets in roman numeric..

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