Select the correct statement(s) about polyhalide ions.

A $I X_{3} X^{-}$ is linear and the central I carries three lone pairs
B $ICl X_{4} X^{-}$ is square planar with two lone pairs on I
CIn $ICl X_{2} X^{-}$ the central iodine is $s p^{3} d$ hybridised and the ion is linear
D $BrF X_{2} X^{+}$ is linear

Answer: A, B, C

I X_{3} X^{-}

and

ICl X_{2} X^{-}

have 2 bond pairs and 3 lone pairs, so they are

s p^{3} d

and linear (lone pairs equatorial).

ICl X_{4} X^{-}

has 4 bond pairs and 2 lone pairs, so it is

s p^{3} d^{2}

and square planar.

BrF X_{2} X^{+}

has 2 bond pairs and 2 lone pairs, so it is bent. Options 1, 2 and 3 are correct.