Chemical Process
Wet chlorine gas produced during electrolysis of brine is dehydrated by

Spraying 66° Be H₂SO₄ counter current to the flow of the gas
None of these
Passing it through a bed of diatomaceous earth
Passing it through a bed of silica gel

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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

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

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