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
Produces high purity (70%) caustic soda directly
Has larger production capacity per unit cell
All of these

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Chemical Process
Presence of sodium tripolyphosphate (an additive) in synthetic detergent

Inhibits its corrosive effects
None of these
Does not allow redeposition of dirt on the cleaned surface
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

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Chemical Process
Transparent soaps (e.g. Pears) are

Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
Metallic soaps with frothing agent and free stearic acid to achieve transparency
Metallic soaps with frothing agent from which glycerine has not been recovered
None of these

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