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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Chemical Process
Presence of carbonaceous matter in the sewage

Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
Increases the quantity of chlorine used for its purification
All of these
Reduces sulphate ions to sulphides causing obnoxious smell

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Chemical Process
Vulcanisation of rubber

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

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