Chemical Process
Hydrocynic acid (HCN) is used as an insecticide for

Citrus fruits
Potato beetle
Controlling poultry lice
Controlling timber degradation by ants

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Chemical Process
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

Always contain some amount of nickel (as their complete removal is very difficult)
Have affinity to retain harmful sulphur compounds
Are prone to rancid oxidation
Cause cholesterol build up and blood clotting

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