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Osmotic pressure observed when benzoic acid is dissolved in benzene is less than that expected from theoretical considerations. This is because

Options

  1. Abenzoic acid is an organic solute
  2. Bbenzoic acid has higher molar mass than benzene
  3. Cbenzoic acid gets associated in benzene
  4. Dbenzoic acid gets dissociated in benzene

Correct answer

C. benzoic acid gets associated in benzene

Step-by-step solution

Osmotic pressure is a colligative property. It depends upon the number of solute particles. Benzoic acid undergoes dimerisation. Number of particles reduces (i < 1) Hence, osmotic pressure observed is less than the theoretical consideration.

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