1.

Generally transition elements and their salts are coloured due to the presence of unpaired electrons in metal ions. Which of the following compounds are coloured ?

Answer»

`KMnO_(4)`
`CE(SO_(4))_(2)`
`TiCl_(4)`
`Cu_(2)Cl_(2)`

Solution :`KMnO_(4)` is COLOURED not because of unpaired ELECTRONS but due to charge transfer. Similarly , in `Ce(SO_(4))_(2)`, Ce is in `+4` oxidation state with `4F^(0)` configuration. It is again coloured ( yellow) not due to f-f transition but due to charge transfer.


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