JEE Advanced levelOne or more correct optionsDifficulty 3 of 3si108
Which statements about distillation methods are correct?
AReducing the external pressure lowers the boiling temperature, so heat-sensitive liquids can be distilled.
BAn immiscible organic liquid and water boil together below 100∘C at 1 atm.
CA fractionating column provides repeated vaporisation-condensation cycles that enrich the vapour in the more volatile component.
DFractional distillation separates the components of a constant-boiling azeotrope into pure liquids.
Answer: A, B, C
Statements 1-3 are the principles of vacuum, steam and fractional distillation. An azeotrope boils at constant composition, so its components cannot be separated by fractional distillation alone.