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In an operating distillation column, the______________________?
  • (A)  Vapors and liquids are at their dew point and bubble point respectively
  • (B)  Driving force for the liquid flow is its specific weight
  • (C)  Driving force for the vapor flow is the pressure drop, as the pressure decreases gradually from the bottom to the top of the column
  • (D)  Highest temperature is encountered at the top of the column
Pick out the wrong statement ?
  • (A)  Reboiler is not used in open steam distillation
  • (B)  The separation of solutes of different molecular sizes in a liquid solution by use of a suitable membrane is called dialysis
  • (C)  Freeze drying is used for the drying of fish
  • (D)  Fenske-Underwood equation is used for calculating theoretical number of plates in a distillation column at normal operating reflux condition