Chemical Process
At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

Proportional to the square of
Independent of
Inversely proportional to
Directly proportional to

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

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

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