Question

The phenomenon in which 2 or more structures, involving identical position of atoms can be written for a particular molecule, is called __________

(a) Conjugation

(b) Resonance

(c) Hyper conjugation

(d) Vibration

This question was addressed to me during an online interview.

Question is taken from Mesomeric Effect in division Reactivity of Molecules Reaction Mechanism of Engineering Chemistry I

Answer 1

Correct answer is (b) Resonance

To explain: The phenomenon in which 2 or more structures, involving the identical position of atoms can be written for a particular molecule, is called resonance. The mesomeric effect is a permanent effect and operates in compounds containing at least one double bond.