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Identify the mixture that shows positive deviations from Raoult's Law

Options

  1. A( CH 3 ) 2 CO + C 6 H 5 NH 2
  2. BCHCl 3 + C 6 H 6
  3. CCHCl 3 + ( CH 3 ) 2 CO
  4. D( CH 3 ) 2 CO + CS 2

Correct answer

D. ( CH 3 ) 2 CO + CS 2

Step-by-step solution

The pressure exerted by the vapours above the liquid surface in equllibrium with the liquid at a given temperature is called vapour pressure. When a non-volatile solute is dissolved in a solvent, its vapour pressure decreases. This decrease in vapour pressure is known as “Lowering of vapour pressure”. The ratio of the Lowering of vapour pressure to the vapour pressure of the pure solvent is called Relative lowering of vapour pressure. It is a Colligative Property. Statement: Raoult's law states that “at a given tem

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