Chemical Process
Ethyl alcohol cannot be produced

From waste sulphite substrate of paper mills
From molasses
None of these
By esterification and hydroloysis of ethylene

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Chemical Process
Reverse osmosis is normally used for the

Desalination of brackish water to produce potable (drinking) water
Purification of oxygen
Separation of isotopes of uranium from gaseous uranium hexaflouride
Separation of helium from natural gas

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Chemical Process
Liquefaction of gases can not be done by

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

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