Which one of the following species has plane triangular shape?

4 2014 AIPMT Chemical Bonding and Molecular StructureVSEPR Theory Easy
Which one of the following species has plane triangular shape?
A $N_3^-$
B $NO_3^-$
C $NO_2^-$
D $CO_2$

Detailed Solution

$NO_3^-$ has $sp^2$ hybridisation with no lone pair on N, so it is plane triangular.

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