Chemical Process
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

As a lubricant
As a foam depressant in distillation column
In hard water for cleaning of cloth
As a rust preventive

ANSWER DOWNLOAD EXAMIANS APP

Chemical Process
Liquefaction of gases can not be done by

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

ANSWER DOWNLOAD EXAMIANS APP