Chemical Process
Vulcanisation of rubber

Increases its oil & solvent resistance
Decreases its tensile strength
Converts its plasticity into elasticity
Increases its ozone & oxygen reactivity

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Chemical Process
Use of hydrated lime in water treatment

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

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Chemical Process
Pick out the wrong statement pertaining to the soap manufacture.

Organic pigments are used as colouring materials in the soap manufacture
Both laundary as well as toilet soaps are manufactured by hot process
Transparent soaps are made by cold process
Colourless rosin is used in the manufacture of laundary soaps

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