JEE Main · 2024 · Shift-IImediumSOL-079

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

Solutions · Class 12 · JEE Main Previous Year Question

Question

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

Options
  1. a

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

  2. b

    180 g of acetic acid dissolved in benzene

  3. c

    180 g of benzoic acid dissolved in benzene

  4. d

    180 g of glucose dissolved in water

Correct Answera

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

Detailed Solution

Strategy:\n> Use the relation ΔTf=Kfm\Delta T_f = K_f \cdot m to solve for the boiling point elevation in the same solution (mm is constant).\n\nAnalysis:\n- ΔTf=Kfm    m=ΔTf/Kf\Delta T_f = K_f \cdot m \implies m = \Delta T_f / K_f.\n- ΔTb=Kbm=Kb(ΔTf/Kf)\Delta T_b = K_b \cdot m = K_b (\Delta T_f / K_f).\n\nGiven Kf=1.86,Kb=0.52,ΔTf=0.186K_f = 1.86, K_b = 0.52, \Delta T_f = 0.186:\n- m=0.186/1.86=0.1textmm = 0.186 / 1.86 = 0.1\\text{ m}.\n- ΔTb=0.52times0.1=0.052textK\Delta T_b = 0.52 \\times 0.1 = 0.052\\text{ K}.\n\ntextAnswer:(3)\boxed{\\text{Answer: (3)}}

Practice this question with progress tracking

Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Solutions) inside The Crucible, our adaptive practice platform.

The solution from the following with highest depression in freezing point/lowest freezing point is (JEE Main 2024) | Canvas Classes