Question: The correct shape and I-I-I bond angles respectively in $\mathrm{I}_{3}^{-}$ion are :-
Distorted trigonal planar; $135^{\circ}$ and $90^{\circ}$
T-shaped; $180^{\circ}$ and $90^{\circ}$
Trigonal planar; $120^{\circ}$
Linear; $180^{\circ}$
Correct Option: 4,
Solution:
Shape : Linear, I-I-I Bond angle $\Rightarrow 180$