Question

In $N{O}_3^{-}$ ion, number of bond pair and lone pair of electron on nitrogen atom are:

• A. 2, 2
• B. 3, 1
• C. 1, 3
• D. 4, 0

Answer 1

The correct option is D 4, 0

In $N{O}_3^{-}$ ion,

Due to the presence of one negative charge, number of valence electrons$=5+1=6$.

One O-atom forms two bonds ($=$ bond) and two O-atom are shared with two electrons of N-atom

Thus, 3 O-atoms are shared with 8 electrons of N-atom.

Number of bond pairs (or shared pairs)$=4$

Number of lone pairs $=0$