Doubt from chemical bonding

Q no:27
Ans:C)
Pls ignore my writings in image

ICl3(s) dimerises to I2Cl6(s) .
It's Cationic form is [ICl2+] and Anionic form is [ICl4-].
So, the answer would be sp3.
Source : My notes

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@Gaurav_2020_3 is it written anywhere in ncert??

I really don't know about that my sir told me that IIT makes question also on dimerisation in Chemical Bonding and gave some examples it is one of those.

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Can you share the pic of those examples?

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Thanks a lot :+1:t2::+1:t2: