Resonance structures can be written for : — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: Identify that resonance structures are possible for molecules with delocalized pi electrons or multiple bonds adjacent to lone pairs. Step 2: Ozone (O3) has a central oxygen atom double-bonded to one terminal oxygen and single-bonded to another, with a lone pair on the central atom. This allows for the delocalization of pi electrons, resulting in two equivalent resonance structures. Ammonia (NH3), methane (CH4), and water (H2O) only contain single bonds and no delocalized pi systems. Step 3: Therefore, resonance structures can only be written for O3, which matches option (a).