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Transition metals usually from coloured ...

Transition metals usually from coloured complexes and d-d transitions `(t_(2g)hArre_(g))` are responsible for colour as the energy difference between `t_(2g)` and `e_(g)` lies in visible region. But all the coloured ions are not dut to d-d transition but charge transfer bands also play important roles. Charge transfer bands may be of two types.
(i) ligand to metal (CTLM)`" "(ii)` metal to ligand (CTML).
Charge transfer transition always produces intense colour as compared to d-d transition.
`MnO_(4)^(-)` is dark purple coloured though Mn is in `(+VII)` oxidation state with `3d^(@)` configuration

A

due to d-d transition

B

due to CTML spectra

C

due to CTLM spectra

D

None of these

Text Solution

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The correct Answer is:
C
Conceptual
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Transition metals usually from coloured complexes and d-d transitions (t_(2g)hArre_(g)) are responsible for colour as the energy difference between t_(2g) and e_(g) lies in visible region. But all the coloured ions are not dut to d-d transition but charge transfer bands also play important roles. Charge transfer bands may be of two types. (i) ligand to metal (CTLM) " "(ii) metal to ligand (CTML). Charge transfer transition always produces intense colour as compared to d-d transition. Select the correct statement

Transition metals usually from coloured complexes and d-d transitions (t_(2g)hArre_(g)) are responsible for colour as the energy difference between t_(2g) and e_(g) lies in visible region. But all the coloured ions are not dut to d-d transition but charge transfer bands also play important roles. Charge transfer bands may be of two types. (i) ligand to metal (CTLM) " "(ii) metal to ligand (CTML). Charge transfer transition always produces intense colour as compared to d-d transition. Select the incorrect statement :

Which is coloured because of d-d transition ?

In which of the following ions, the colour is not due to d-d transition?

Transition metals are coloured due to the following electronic transition