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Which of the following refrigerant has the lowest freezing point?

A. R-11

B. R-12

C. R-22

D. Ammonia

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  8. The process of under-cooling is generally brought about by
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  17. The relative humidity lines on a psychrometric chart are
  18. The lowest temperature during the cycle in a vapour compression system occurs after
  19. Vertical lines on pressure-enthalpy chart show constant
  20. During sensible cooling of air ________ decreases.
  21. The evolution of heat of solution takes place in ammonia absorption plant when
  22. The boiling point of ammonia is
  23. The reciprocating refrigerant compressors are very suitable for
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  25. In a domestic vapour compression refrigerator, the refrigerant commonly used is
  26. The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C.…
  27. Wet bulb temperature is the temperature of air recorded by a thermometer, when
  28. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of…
  29. The condition of refrigerant after passing through the expansion or throttle valve, in a vapour compression…
  30. Which of the following refrigerant has the lowest boiling point?