Question

Ozone-depleting substances are chemicals that destroy the ozone layer that protects the earth. Which of the following is not an ozone-depleting substance.
1. chlorofluorocarbons
2. carbon tetrachloride
3. methyl chloroform
4. potassium permanganate

Answer 1

Correct Answer - Option 4 : potassium permanganate

The correct answer is potassium permanganate.

• Potassium permanganate is not an ozone-depleting substance.
• Potassium permanganate (KMnO₄) is a common chemical compound that combines manganese oxide ore with potassium hydroxide. It was first developed as a disinfectant in 1857.
• Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also as a medication for dermatitis, for cleaning wounds, and general disinfection.
• It is on the WHO Model List of Essential Medicines, the safest and most effective medicines needed in a health system.

Ozone-depleting substance	Description
Chlorofluorocarbons	Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine. They are usually used as a coolant in refrigerators and air conditioners used in cars, etc.
Carbon tetrachloride	It is normally used as a solvent.
Methyl chloroform	It finds its applications usually in industries for chemical processing, etc.