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The solution from the following with highest depression in freezing point/lowest freezing point is

Options

  1. A180 g of acetic acid dissolved in 1 L of aqueous solution.
  2. B180 g of acetic acid dissolved in benzene
  3. C180 g of benzoic acid dissolved in benzene
  4. D180 g of glucose dissolved in water

Correct answer

A. 180 g of acetic acid dissolved in 1 L of aqueous solution.

Step-by-step solution

Depression in freezing point or elevation in melting point depends upon the number of solute particles rather than the kind of solute particles. Depression in freezing point ( ΔT f ) is directly proportional to number of solute particles. Also, ΔT f is directly proportional to molality. ΔT f = m × k f Amongst the given options acetic acid has lowest molecular mass. The molar mass of acetic acid is 60 . 05 g mol -1 . Hence if the molecular mass is less, molality will be more, so the lowest freezing point will be sho

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