Question

Which of the following pairs has a strong closure in the first species? (a) O2-, O2 (b) N2, N2 + (c) NO +, NO–

Answer 1

Answer:

In pairs II and III only is the stronger bond found in the first species.

I:O

2

2−

,O

2

;II:N

2

,N

2

+

;III:NO

+

,NO

−

The bond orders of O

2

2−

,O

2

;:N

2

,N

2

+

;NO

+

,NO

−

are 1, 2, 3, 2.5, 3 and 2 respectively.

Higher is the bond order, stronger is the bond formed.