Chemical Process
Wax is a

Liquid at room temperature
Mixture of glycerides
Mixture of esters of polyhydric alcohols excepting glycerine
Mixture of glycerides of fatty acids

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Chemical Process
Use of hydrated lime in water treatment

Is to adjust the pH value
All of these
After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂
Before filtration, reduces the bacterial load on filters

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