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Which of the following is a correct statement ?

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Aq. solutions of Cu⁺ and Zn²⁺ are colour less

Aq. solutions of Cu²⁺ and Zn²⁺ are colour less

Aqueous solutions of Fe³⁺is green in colour

Aqueous solutions of ${MnO}_{4}^{-}$ is colourless

answer is A.

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Detailed Solution

Configuration of Cu⁺²−[Ar]3d⁹Zn⁺²−[Ar]3d¹⁰

Copper has an unpaired electron which acts as a F center and allows electron transition in visible region importing color while Zn⁺² is having no unpaired electrons hence colorless.

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