Aqueous `Cu^(2+)` ions are blue in colour, where as Aqueous `Zn^(2+)` ions are colourless. Why ?

Cu^+ ion is colourless. Why?

Cu^(2+) ions are coloured but Zn^(2+) ions are colourless. Give reason.

(a) Cu^2+ ions are coloured but Zn^2+ ions are colourless . Give reason . (b) Write the formula to calculate spin only magnetic moment .

Which ion will give colour in the aqueous solution ?

Which ion will give colour in the aqueous solution ?

Why Zn^(2+) ions are colourless while Ni^(2+) ions are green and Cu^(2+) ions are blue in colour?

Ions of Zn^(2+) and Ti^(4+) are colourless while Cu^(2+) and Ni^(2+) are coloured . Why ?