1.

Which of the following compounds can combine as ligand in complex compound formation ?

Answer»

`SnO_2`
`GeO_2`
`SiO_2`
CO

Solution :CO, carbon monoxide WORK as carbonyl LIGAND by donating electron pair to the METALS. CO forms complex metal carbonyl COMPOUND with transition metals like NI, Fe, Co and Cr.
`Ni+4CO overset"333K-343 K"to [Ni(CO)_4]`


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