Which of the following gases is used in refrigerators?

Correct option is A

Ammonia is used in refrigerators.

Explanation:
● Ammonia (NH₃) is commonly used as a refrigerant in industrial refrigeration systems due to its high efficiency, low cost, and eco-friendly properties.
● It absorbs large amounts of heat when it evaporates, making it an ideal choice for cooling systems.
● Ammonia has been used for refrigeration since the 19th century, particularly in large-scale applications like cold storage and ice plants.

Information Booster:
● Modern domestic refrigerators primarily use hydrofluorocarbons (HFCs) due to safety concerns associated with ammonia's toxicity.
● Ammonia is considered an environmentally friendly refrigerant because it has zero ozone depletion potential (ODP) and zero global warming potential (GWP).
● Proper handling and safety measures are essential when using ammonia in refrigeration.

Additional Information:

• (B) Acetylene: Used in welding and cutting processes, not in refrigeration.
• (C) Radon: A radioactive gas, unrelated to refrigeration.
• (D) Ethylene: Used in the production of plastics and chemicals, not as a refrigerant.