Which statement(s) about coordination of cation is/ are true?

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Most metal ions exhibit only a single characteristic coordination number

For most cations, the coordination number depends on the size, structure and charge of the ligands.

The coordination number is determined solely by the tendency to surround the.metal atom with the same number of electrons as one of the rare gases.

The coordination number is equal to the number of ligands bonded to the metal atom

answer is D.

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Detailed Solution

A few metal ions display multiple coordination numbers. As a result, statement A is untrue.
The number of ligands in a coordination compound that are directly bound to the main metal atom or ion is known as the coordination number. Here, a sigma bond holds the monodentate ligand to the metal. As a result, statement B is untrue.
The propensity to surround the metal atom with the same amount of electrons as one of the rare gases determines the coordination number. There are also a number of other elements. As a result, choice C is incorrect.
The charge on a metal ion, the charge on the ligand, the relative sizes of the metal ion and the ligands, and other factors affect the coordination number of a metal ion

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