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
@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.
Can you share the pic of those examples?
Thanks a lot