Question

If the total number of bonds between two atoms is 3 the total number of resonating structures is 2 what is the bond order?

(a) 0.5

(b) 1.5

(c) 2.5

(d) 3.5

I had been asked this question in an online interview.

I want to ask this question from Fundamental Concepts in Organic Reaction Mechanism topic in section Organic Chemistry – Basic Principles and Technique of Chemistry – Class 11

Answer 1

Correct answer is (b) 1.5

To elaborate: Bond order is given by the formula that the total number of bonds between two atoms / the total number of resonating structures, the bond order = 3/2 = 1.5, we can say that there is a relation between resonance and bond order through this equation.