Question

1. which of the following molecules is a classic example of resonance?

a. methane (ch₄)
b. benzene (c₆h₆)
c. ammonia (nh₃)
d. water (h₂o)

Explanation:

Resonance occurs when a molecule can be represented by two or more Lewis - structures that differ only in the placement of electrons. Benzene ($C_6H_6$) has two resonance structures with alternating single and double bonds in the ring, which contribute to its stability. Methane ($CH_4$) has only single bonds and no resonance. Ammonia ($NH_3$) has a lone - pair on the nitrogen atom but no resonance structures in the traditional sense for its overall molecule. Water ($H_2O$) also does not have resonance structures for its main molecular structure.

Answer:

B. Benzene ($C_6H_6$)