Chemical Process
Celluloid is chemically

Cellulose acetate butyrate
Cellulose acetate
Regenerated cellulose
Cellulose nitrate

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Chemical Process
Use of hydrated lime in water treatment

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

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