Which molecule/ion among the following cannot | vedclass

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(A) ligand is an atom,molecule,or ion that donates a pair of electrons to a central metal atom or ion to form a coordinate bond.For a species to act a

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$CH_4$

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(A) ligand is an atom,molecule,or ion that donates a pair of electrons to a central metal atom or ion to form a coordinate bond.For a species to act as a ligand,it must possess at least one lone pair of electrons.In $CH_4$ (methane),the carbon atom is $sp^3$ hybridized and forms four covalent bonds with hydrogen atoms,completing its octet.Since $CH_4$ has no lone pair of electrons available for donation,it cannot act as a ligand.

Which molecule/ion among the following cannot act as a ligand in complex compounds?

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Consider the following statements according to Werner's theory:
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An example of a double salt is:

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