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

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

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Chemical Process
Unsaturated oils compared to saturated oils have

Lower melting point & lower reactivity to oxygen
Higher melting point & lower reactivity to oxygen
Higher melting point & higher reactivity to oxygen
Lower melting point & higher reactivity to oxygen

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