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
All of these
Is to adjust the pH value

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Chemical Process
In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ⇋ 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by

Removing some quantity of SO₃ during intermediate stage
Maintaining low temperature & pressure in the converter
Putting more quantity of V₂O₅ catalyst in the converter
Increasing the oxygen concentration

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