Which of the following is a consequence of chlorine monoxide formation?

• A. Enhanced ozone formation
• B. Impeded ozone molecule formation
• C. Increased atmospheric pressure
• D. Improved air quality

Answer: (B)

Chlorine monoxide (ClO) is a significant species involved in the depletion of the ozone layer. When chlorine atoms from chlorofluorocarbons (CFCs) and other ozone-depleting substances (ODS) release chlorine into the atmosphere, they can react with ozone (O₃) to form chlorine monoxide. This reaction impedes the formation of ozone molecules because it directly depletes the existing ozone present in the stratosphere. The presence of chlorine monoxide means that there are fewer ozone molecules available, as they are being converted into ClO, which subsequently reacts with more ozone, continuing the cycle of depletion.

Thus, the formation of chlorine monoxide is critical in understanding the mechanisms of ozone layer depletion, highlighting its role in obstructing the natural replenishment of ozone, effectively reducing the atmospheric concentration of this vital molecule that protects life on Earth from harmful ultraviolet radiation.