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Chemistry Question on Chemical bonding and molecular structure

Among the following species which two have trigonal pyramidal shape? (I)NI3(II)I3−\left(I\right)NI_{3}\left(II\right)I^{-}_{3} (III)SO32−(IV)NO3−\left(III\right)SO^{2-}_{3}\left(IV\right)NO^{-}_{3}

A

I and III

B

III and IV

C

I and IV

D

II and III

Answer

I and III

Explanation

Solution

Answer (a) I and III