Chemical Process
Diaphragm electrolytic cell as compared to mercury electrolytic cell

Requires less specific power consumption for the production of chlorine
Produces 70% NaOH solution
Requires lesser investment for similar capacity
All of these

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Chemical Process
Liquefaction of gases can not be done by

Merely compressing it beyond critical pressure
Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
Exchange of heat with colder stream
Adiabatic expansion against a piston or in a turbine

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