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Which gives violet compourd bead in borax bead testA. `Fe^(2+)`B. `Ni^(2+)`C. `Co^(2+)`D. `Mn^(2+)`

Answer» Correct Answer - D
As `Mn^(+2)` has all its electrons (5) unpaired in its d-orbital, so its extra stable configuration requires high excitation energy and so it gives violet colour.


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