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Explain distillation under reduced pressure |
Answer» Solution :(i) This method is used to purify liquids having very high boiling points (ii) those, which decompoe at or below their boiling points. Such liquids are made to boil at a temperature lower than their normal boiling points by reducing the pressure on their SURFACE  A LIQUID boils at a temperature at which its vapour pressure is equal to the external pressure. The pressure is REDUCED with the help of a water pump or VACUUM pump Use: Glycerol can be separated from spent-lye in soap industry by using this technique |
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