Which of the following pairs is coloured in aqueous solution?A. `Ni^(2 – InterviewSolution

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1.	Which of the following pairs is coloured in aqueous solution?A. `Ni^(2+),Cu^(+)`B. `Ni^(2+),Ti^(3+)`C. `Sc^(3+),Ti^(3+)`D. `Sc^(3+),Co^(2+)`
Answer» Correct Answer - B Both `Ni^(2+)(3d^(8))` and `Ti^(3+)(3d^(1))` have unpaired electrons, Therefore, these are coloured only in the case.

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