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Crystallisation of sugar is carried out in a vacuum pan in order to

  • A.boil the syrup at a low temperature
  • B.raise the boiling point of the syrup
  • C.remove all the water completely
  • D.dissolve the remaining impurities

Answer: A

Sugar darkens and inverts if held hot, so reducing the pressure lets the syrup boil near seventy degrees. The same reasoning applies to many heat sensitive products in the food industry. Colour and inversion are both temperature driven.

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