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NEET levelSingle correct optionDifficulty 1 of 3cc117

Which of the following ligands can give rise to linkage isomerism in its complexes?

A $NH X_{3}$
Bethane-1,2-diamine (en)
C $Cl X^{-}$
D $NO X_{2} X^{-}$

Answer: D

Linkage isomerism needs an ambidentate ligand that can bind through two different donor atoms.

NO X_{2} X^{-}

binds through N (nitro) or O (nitrito). The other ligands have only one type of donor atom.

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