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)
Are prone to rancid oxidation
Cause cholesterol build up and blood clotting
Have affinity to retain harmful sulphur compounds

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Chemical Process
Presence of sodium tripolyphosphate (an additive) in synthetic detergent

Inhibits its corrosive effects
Does not allow redeposition of dirt on the cleaned surface
None of these
Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

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