Chemical Process
Deaeration of water in its treatment is necessary, as it

Minimises its turbidity
None of these
Minimises its corrosiveness
Helps in controlling its taste and odour

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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

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

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Chemical Process
Nylon 66 is so named because the

Polymer was first synthesised in 1966
Number of nitrogen atoms between two carbon atoms are 6
Number of carbon atoms between two nitrogen atoms are 6
Average degree of polymerisation of the polymer is 1966

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