Chemical Process
Fumigant insecticides

Kill insects, when they eat it
Are absorbed throughout the plant
Emit poisonous vapour
None of these

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

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
Water with pH value less than 7, is acidic

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