NextMockपरीक्षा खोजें, जैसे SSC CGL, UPPSC, लेखपाल
English
UPSC PYQPrelims 2023

Civil Services Examination · प्रश्न 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
उत्तर देखें और व्याख्या

उत्तर: (D) All four

व्याख्या

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