Chemical Process
Lindane is

Not a fumigant
A by-product of BHC manufacture
Both B and C
BHC (Benzene Hexa Chloride) containing 99% γ-isomer

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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
Is to adjust the pH value
All of these
Before filtration, reduces the bacterial load on filters

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