Question

The types of hybrid orbitals of nitrogen in NO2+, NO3– and NH4+ respectively are expected to be
(i) sp, sp3 and sp2
(ii) sp, sp2 and sp3
(iii) sp2, sp and sp3
(iv) sp2, sp3 and sp


NCERT Class XI
Chemistry - Exemplar Problems

Chapter 4. Chemical bonding and molecular structure

Answer 1

The answer is  (ii) sp, sp2 and sp3<br /> 

Answer 2

The types of hybrid orbitals of nitrogen in $N O_{2}^{+}, NO_3^-, and \ NH_4^+$ respectively are expected to be $(ii) \ sp, \ sp^{2} \ and \ sp^{3}$

Explanation:

From the given,

$N O_{2}^{+} \ is \ nitrite \ ion$

$N O_{3}^{-} \ is \ nitrate \ ion$

$NH_4^+ \ is \ ammonium \ ion$

Formula for hybridization is:

$\frac{1}{2}(V+H-C+A)$

Where,

H = Number of "surrounding monovalent atoms"  

C = "Cationic charge"  

V = Number of "valance electrons" in central atom  

A = "Anionic charge"

1. $N O_{2}^{+}=\left(\frac{1}{2}\right) \times(5+0-1+0)=2=s p$
2. $N O_{3}^{-}=\left(\frac{1}{2}\right) \times(5+2-0+1)=3=s p^{2}$
3. $N H_{4}^{+}=\left(\frac{1}{2}\right) \times(5+4-1+0)=4=s p^{3}$

Hence (ii) is correct answer.