Chemical Process
Coke used for the production of calcium carbide should have

Low ash content
Low ignition temperature
High electrical resistivity
All of these

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Chemical Process
Linde process of gas liquefaction employs

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

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Chemical Process
Shaving soaps are

Metalic soaps compounded with frothing agents
None of these
High free alkali soaps having excess of cane sugar and alcohol
Soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property

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