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Ti^(2+) is purple while Ti^(4+) is colou...

`Ti^(2+)` is purple while `Ti^(4+)` is colourless because

A

there is no crystal field effect in `Ti^(4+)`

B

`Ti^(2+)" has "3d^(2)` configuration

C

`Ti^(4+)" has "3d^(2)` configuration

D

`Ti^(4+)` is a very small cation when compared to `Ti^(2+)` and does not absorb any radiation.

Text Solution

Verified by Experts

The correct Answer is:
B
(b) `Ti^(2+), [Ar]3d^(2), Ti^(4+), [Ar]3d^(0)` . Since `Ti^(2+)` ion has two unpaired electrons d-d transition is possible due to absorption of light in the visible region. Therefore it is purple. `Ti^(4+)` ion without any unpaired electron is colourless.
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