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(i)Which one out of Fe^(2+)and Fe^(3+) ions is more paramagnetic and why(ii)Which of the following ions are expected to be coloured and whyFe(_2+), Mn^(2+), Cr^(3+), Cu(+) Sc^(3+), Ti^(4+) |
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Answer» SOLUTION :`Fe^(3+)` is more paramagnetic than `(Fe^(2+)` as `Fe^(3+)`has five UNPAIRED electrons while `Fe^(2+)` possesses four unpaired electrons The ions of transition elements which possess unpaired electrons SHOW a characteristic colour, due to d-d transition`(n-1)d^(0)or(N-1)^(10)` configuration does not involve d-d transition and hence, is COLOURLESS. `Fe^(2+), Mn^(2+)` and `Cr^(3+)` are coloured while `Cu^(+), Sc^(3+)` and `Ti^(4+)` are colourless |
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