Ti^ 3+ is purple while Ti^ 4+ is colourless because _____

MHT CET Chemistry question

is purple while is colourless because

(A)There is no crystal field effect in
(B)The energy difference between and is quite high and hence does not fall within the visible region
(C) has configurationCorrect
(D) is very small cation when compared to and hence, does not absorb any radiation

Answer: (C)

is and its electron can undergo a d-d transition by absorbing visible light, whereas is with no d electron to excite; crystal

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Question ID VK-073113