Chemical Process
DDT should not be allowed to come in contact with iron (during its manufacture) to

Avoid its decomposition
Achieve non-hygroscopic property
Prevent sulphonation of the monochlorobenzene by the acid catalyst
None of these

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

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