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Deodorisation of edible oil is essentially

  • A.Chilling and filtration
  • B.Steam distillation under high vacuum
  • C.Filtration through activated earth
  • D.Treatment with caustic soda

Answer: B

Volatile aldehydes, ketones and remaining free fatty acids are stripped off by steam at low absolute pressure, which keeps the required temperature down. It is the last major step and largely determines the oil's flavour and shelf life.

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