Chemical Process
Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

Consumes less power per ton of Cl₂ produced
Has larger production capacity per unit cell
All of these
Produces high purity (70%) caustic soda directly

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Chemical Process
Nylon 66 is so named because the

Number of nitrogen atoms between two carbon atoms are 6
Number of carbon atoms between two nitrogen atoms are 6
Polymer was first synthesised in 1966
Average degree of polymerisation of the polymer is 1966

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Chemical Process
Use of hydrated lime in water treatment

Before filtration, reduces the bacterial load on filters
All of these
After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂
Is to adjust the pH value

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