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UPSC PYQPrelims 2023

Civil Services Examination · Question 20

Consider the following: 1. Aerosols 2. Foam agents 3. Fire retardants 4. Lubricants In the making of how many of the above are hydrofluorocarbons used?

  1. Only one
  2. Only two
  3. Only three
  4. All four
Show answer & explanation

Answer: (D) All four

Explanation

HFCs are used as aerosol propellants, foam-blowing agents, fire suppressants and in lubricants/solvents (besides refrigerants).