Liquefaction of gases cannot be done by___________________?

Liquefaction of gases cannot be done by___________________?

(A) Exchange of heat with colder stream

(B) Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

(C) Merely compressing it beyond critical pressure

(D) Adiabatic expansion against a piston or in a turbine

Submitted By :Ali Uppal

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