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Out of the following how many of them are coloured compounds. `MnO_4^(ɵ),Cr_2O_7^(2-),CrO_4^(2-),Sc^(3+),Ti^(4+),Zn^(2+),Mn^(3+),Cu^(2+),Fe^(2+),Fe^(3+)` |
Answer» `MnO_4^(ɵ),Cr_2O_7^(2-),CrO_4^(2-)` (they are `3d^0` configuration yet they are coloured due to charge transfer theory) `Mn^(3+)(3d^4),Cu^(2+)(3d^9),Fe^(2+)(3d^6),Fe^(3+)(3d^5)`, all are coloured due to the presence of unpaired electrons. colourless ions are: `Sc^(3+),Ti^(4+)(3d^0),Zn^(2+)(2d^(10))` |
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