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Bleaching of refined oil is carried out mainly to

  • A.Adsorb pigments and metals onto earth
  • B.Remove free fatty acids
  • C.Remove odour compounds
  • D.Crystallise waxes

Answer: A

Bleaching earth or activated carbon is mixed with the oil under vacuum and then filtered out, carrying the impurities with it. It also removes peroxides and traces of metals that would otherwise catalyse oxidation later.

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