Question

resonance is not exhibited by................... (a) phenol (b) aniline (c) nitrobenzene (d)cyclohexane

Answer 1

It is not exhibited by cyclohexane because no conjugation of pi bonds

Answer 2

(d) Cyclohexane does not exhibit resonance.

Explanation:

This is because the double bond in cyclohexane is localized and there are no free electrons in the p orbital of cyclohexane.  

Resonance is exhibited by molecules for which more than one possible Lewis structures can be drawn. In such molecules, the physical and chemical properties are explained using different structures but none of the structure can represent the molecule completely. Phenol, aniline as well as nitro-benzene all have resonance structures.