Explauation The hybridisation of If \(_{5}\) molecule is \(S p^{3} d^{2}\), as the ceutral atom ioduie has 7 valeuce electrons out of which 5 electuons foum 5 sigma bonds with \(F\) atoms aud 2 electuons foum 1 lone Lone pair implying the hybrudisation of the ceutral atom is \(s p^{3} d^{2}\)

The hybruduiation of \(I_{3}-\) is \(S p^{3} d\). aud it has 3 lone pars aud 2 bond pajrs. If has linear shape

\(I_{3}+\) has \(\operatorname{sp}^{3}\) hybrudisation and two pairs on central atom, therefore shape would be beut