Chemical Process
Rosin soap is added during paper manufacture to

Impart resistance to penetration by liquids
Impart adhesive properties
Improve opacity
None of these

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Chemical Process
Use of hydrated lime in water treatment

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

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