Chemical Bonding and Molecular Structure - Result Question 46
####47. Which one of the following species has plane triangular shape?
[2014]
(a) $N_3{ }^{-}$
(b) $NO_3^{-}$
(c) $NO_2^{-}$
(d) $CO_2$
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Solution:
- (b) Hybridization of $NO_3^{-}=\frac{1}{2}(5+0+1-0)$ $=\frac{6}{2}=3=s p^{2}$ hence geometry is trigonal planner.
$NO_2^{-}$(nitrite ion) also has $s p^{2}$ hybridization and gives a trigonal planner geometry but because there are only two outer atoms, the molecular geometry is bent with $Ð 120^{\circ}$ bond angles.
