Chemical Process
Digestion of wood-base materials (for manufacture of pulp) is done to

Prevent deterioration on storage
Remove lignin
None of these
Produce long fibres

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Chemical Process
Pick out the false statement pertaining to water treatment.

Sodium sulphate or sodium carbonate do not cause hardness in water
Water with pH value less than 7, is acidic
Aeration of water is effective in CO₂ removal
The zeolite water softening process reduces the hardness of water by not more than 50%

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