`Ti^(2+)` is purple while `Ti^(4+)` is colourless because

Ti^(2+) is brown while Ti^(4+) is colourless, because -

This energy lies in visible region and ie, why electronic transition t_(2g) hArr e_(g) are responsible for colour. Such transitions are not possible d^0 and d^10 configuration. Ti_((aq.))^(3+) is purple while Ti_((aq.))^(4+) is colourless because :

Ti^(3+) is purple but Ti^(4+) is colourless. This is because

Explain Co^(2+) is coloured whereas Ti^(4+) is colourless. Why ?

Cuprous ion is colourless while cupric ion is coloured because

Cuprous ion is colourless, while cupric ion is coloured because