Chemical Process
Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?

Formic acid
Stearic acid
Calcium & aluminium stearate
Xanthates

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Chemical Process
Use of hydrated lime in water treatment

Before filtration, reduces the bacterial load on filters
All of these
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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