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

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

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Chemical Process
Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is

A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
All of these
Still in development stage (by employing fluidised bed technique)
A slow reaction

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