Chemical Process
The function of gypsum addition during cement making is to

Neither A nor B
Decrease the cement setting rate
Both A and B
Increase the density of cement

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Chemical Process
Use of hydrated lime in water treatment

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

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