Assertion: NF is a weaker ligand than N CH . Reason: NF ionizes to give Fions in aqueous solution.

It is correct statement that 3 NF is a weaker ligand than 3 3 N CH , the reason is that fluorine is highly electronegative therefore, it with draw electrons from nitrogen atom. Hence, the lone pair of nitrogen atom cannot be ligand. While 3 3 N CH is strong ligand because 3 CH is electron releasing group.