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Predict which of the following will be c...

Predict which of the following will be coloured in aqueous solution ?
`Ti^(3+),V^(3+),Cu^(+),Sc^(3+),Mn^(2+),Fe^(3+)` and `Co^(2+)`.
Give reasons for each.

Text Solution

Verified by Experts

Only those iions which have incompletely filled d-orbitals are coloured. Those with fully-filled or empty d-orbitals are colourless. Thus, `Ti^(3+),V^(3+),Mn^(2+),Fe^(3+)` and `Co^(2+)` are all coloured due to d-d transition. `MnO_(4)^(-)` is also coloured but due to charge transfer. Only `Sc^(3+)(3d^(0))` is colourless.
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U-LIKE SERIES-THE D-AND F-BLOCK ELEMENTS -NCERT TEXTBOOK EXERCISES
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  14. Which is the last element in the series of the actinoids ? Write the e...

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  16. Name the members of the lanthanoid series which exhibit +2 oxidation s...

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  17. Write the electronic configurations of the elements with atomic number...

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  18. Compare the general characteristics of the first series of transition ...

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  19. Write down the number of 3d electrons in each of the following ions : ...

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