Chemical Process
Which of the following processes can remove both temporary as well as permanent hardness of water?

Boiling
None of these
Distillation
Filtration

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Chemical Process
Linde process of gas liquefaction employs

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

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