NextMockપરીક્ષાઓ શોધો, દા.ત. SSC CGL, UPPSC, Lekhpal
UPSC PYQPrelims 2023

Civil Services Examination · પ્રશ્ન 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
જવાબ બતાવો અને સમજૂતી

જવાબ: (D) All four

સમજૂતી

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