Chemical Process
Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of

Trichloroethylene
Methanol
Parathion
Perchloroethylene

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

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