Chemical Process
Proximate analysis of coal determines its __________ content.

None of these
Moisture, sulphur, nitrogen & fixed carbon
Moisture, ash, sulphur & volatile matter
Moisture & volatile matter

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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)
Adiabatic expansion against a piston or in a turbine
Exchange of heat with colder stream

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