Question

8.
In NO3 ion, the number of bond pairs of electrons
around nitrogen atom are [NCERT Pg. 115]
(1) 2
(2) 5
(3) 1
(4) 4​

Answer 1

In N O_{3}^{-}NO

3

−

ions, the number of bond pair electron and the lone pair electron are 4,0.

Explanation

In N-atom the number of valence electron present is 5. Due to the presence of a single negative electron then the total number of valence electron present in it is 5+1 =6.And one O-atom forms the two bond (double bond ) and two O-atom shared with two-electron of N-atom.Similarly, thus 3 O-atom shares the 8 electron of N-atom.Finally, the "number of bonding pairs" is 4 and the "number of lone pair" is 0.

Answer 2

Answer:

Option (4) 4

Explanation:

In N-atom, number of valence electrons = 5

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