Which of the following can exhibit resonance?
(i) Oxygen (ii) Ozone
(iii) Allene (iv) Hydrogen peroxide

Options

A. (i), (ii), (iii), (iv)
B. (ii), (iii)
C. (i), (ii), (iii)
D. (i), (ii)

Answer

C

Explanation

First we write the Lewis structures:
`underset(..)overset(..)O=overset(..)underset(..)O` `O_3impliesoverset(..)underset(..)O=overset(+)underset(..)O-underset(..)overset(..)Ooverset(-):`
Allene`impliesH_2C=C=CH_2`
`H_2O_3impliesH-overset(..)underset(..)O-overset(..)underset(..)O-H`
Since `H_2O_2` does not have a multiple bond, it cannot exhibit resonance.