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Which one of the following is not a method of desalination ?

  • A.Distillation
  • B.Reverse Osmosis
  • C.Electrodialysis
  • D.Electrochlorosis

Answer: D

Electrochlorosis is not a method of desalination.

Desalination removes dissolved salts from sea or brackish water. Distillation evaporates the water and condenses the vapour, leaving salts behind. Reverse osmosis forces water through a semi-permeable membrane that holds back the salts. Electrodialysis uses an electric field to draw salt ions through ion-selective membranes, separating fresh water from brine.

'Electrochlorosis' is not a desalination technique. (Electrochlorination, which produces chlorine from brine for disinfection, adds a chemical to water rather than removing salt.)

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