📊 Chemistry
Q. Which of the following is used as a refrigerant in cooling systems?
  • (A) Methane
  • (B) Ammonia
  • (C) Carbon monoxide
  • (D) Oxygen
✅ Correct Answer: (B) Ammonia

Explanation: Ammonia is widely used as a refrigerant due to its high latent heat of vaporization.

Explanation by: Sikhar Chaudhary
Ammonia is widely used as a refrigerant due to its high latent heat of vaporization.

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