Q.

Ti3+ is purple but Ti4+ is colourless. This is because

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a

d1 configuration of Ti3+

b

d0 configuration of Ti3+

c

d3 configuration of Ti3+

d

d10 configuration of Ti3+

answer is A.

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Detailed Solution

Any elements or ion shows colour due to presence of unpaired electron in their configuration. As Ti+3 has electronic configuration d1 so it shows colour but Ti4+ ion does not show colour due to absence of unpaired electrons.

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