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

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

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Chemical Process
Wax is a

Mixture of glycerides
Liquid at room temperature
Mixture of glycerides of fatty acids
Mixture of esters of polyhydric alcohols excepting glycerine

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