Question:
Among the following species which two have trigonal bipyramidal shape ?
(1) $\mathrm{NI}_{3}$
(2) $\mathrm{I}_{3}^{-}$
(3) $\mathrm{SO}_{3}^{2-}$
(4) $\mathrm{NO}_{3}^{-}$
Correct Option:
Solution:
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