Which of the following pairs is coloured in aqueous solution?
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+)`
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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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