Chemical Engineering Thermodynamics
Which of the following is an undesirable characteristics of a refrigerant ?

None of these
Its vapor pressure at the condenser temperature should be very high
It should be non-explosive
It should have a sub-atmospheric vapor pressure at the temperature in refrigerator coils

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Chemical Engineering Thermodynamics
A large iceberg melts at the base, but not at the top, because of the reason that

Due to the high pressure at the base, its melting point reduces
Ice at the base contains impurities which lowers its melting point
All of these
The iceberg remains in a warmer condition at the base

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