Chemical Process
Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?

Glasses
Teflon
Porcelain/Potteries
Slag cement

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Chemical Process
Linde process of gas liquefaction employs

Merely compressing the gas beyond its 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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