Which gas is a major product of industrial production for use in aerosol propellants and air conditioning systems?

Correct option is D

The correct answer is: (d) Freon-12

Explanation:

• Freon-12, also known as Dichlorodifluoromethane (CCl₂F₂), is a chlorofluorocarbon (CFC) that was widely used as a refrigerant and aerosol propellant in air conditioning systems, refrigerators, and spray cans.

• It became popular due to its non-flammability, low toxicity, and high stability.

• However, due to its role in ozone layer depletion, its use has been largely phased out under the Montreal Protocol.

• Freon-12 is a CFC, part of a group of compounds that contributed to ozone depletion.

• The gas was used extensively until the 1990s, especially in refrigeration and air conditioning systems.

• The Montreal Protocol (1987) aimed to eliminate substances that deplete the ozone layer, including Freon-12.

• Alternatives like HFCs (e.g., R-134a) and natural refrigerants are now used as substitutes.

• Freon-12 was also used in aerosol sprays due to its excellent propellant properties.

• Although production is banned in most countries, some older systems still contain Freon-12.