1.

Identify the complexes which are expected to be coloured.

Answer»

`Ti(NO_(3))_(4)`
`[Cu(CH_(3)CN)_(4)]^(+)`
`[Cr(NH_(3))_(6)]^(3+)`
`K_(3)[VF_(6)]`

Solution :`Ti^(4+)=3d^(0)""Cu^(+)=3d^(10)`
`Cr^(3+)=3d^(3)""V^(3=)=3d^(2)`
IONS with UNPAIRED electrons are expected to be coloured.


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