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Saponification of a fat with sodium hydroxide gives

  • A.soap and glycerine
  • B.soap and free fatty acids
  • C.a detergent and some water
  • D.fatty alcohols and common salt

Answer: A

The ester links are hydrolysed and the acids are neutralised in one step, releasing the glycerol backbone. Glycerine recovery from the spent lye is a significant part of the value of a soap plant. The reaction is a hydrolysis and a neutralisation together.

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