GUJARAT SET 2023
Which of the following statement does not hold good for ozone?
- (A) It is a powerful oxidizing agent
- (B) It is used as a disinfectant
- (C) It depletes on exposure to chlorofluorocarbons
- (D) It is not used in organic reactions
Correct Answer: (D) It is not used in organic reactions
Ozone is used in organic reactions, particularly in a process called ozonolysis. Ozonolysis is a significant organic reaction where ozone is used to cleave carbon-carbon double or triple bonds, forming various organic compounds such as aldehydes and ketones. This statement is incorrect, and therefore, the one that does not hold good.
(A) It is a powerful oxidizing agent: Correct. Ozone (O3) is a very strong oxidizing agent, even more so than diatomic oxygen (O2).
(B) It is used as a disinfectant: Correct. Due to its powerful oxidizing properties, ozone is widely used as a germicide and disinfectant for sterilizing water and air (ozonation).
(C) It depletes on exposure to chlorofluorocarbons: Correct. Chlorofluorocarbons (CFCs) release chlorine radicals in the stratosphere upon exposure to UV radiation, which then act as catalysts to destroy ozone molecules, leading to ozone layer depletion.