Q
Liquefaction of gases cannot be done by___________________?
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A
A. Exchange of heat with colder stream
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B
B. Adiabatic expansion through a throttle valve (joule-thomson expansion)
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C
C. Merely compressing it beyond critical pressure
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D
D. Adiabatic expansion against a piston or in a turbine
Correct Answer:
C. C. Merely compressing it beyond critical pressure
