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MHT CET Medical202623 April 2026Morning ShiftChemistrySolutionsActual

For a solution containing a non-volatile solute in a volatile solvent, which of the following relationships is correctly represented?

Options

  1. AP₁ < P₁^0
  2. BT_b < T_b^0
  3. CT_f > T_f^0
  4. DT_f = T_f^0

Correct answer

A. P₁ < P₁^0

Step-by-step solution

When a non-volatile solute is added to a volatile solvent, the vapor pressure of the solution decreases because a fraction of the surface area is occupied by non-volatile solute particles, reducing the escaping tendency of solvent molecules. Let P₁ be the vapor pressure of the solvent in the solution and P₁^0 be the vapor pressure of the pure solvent. According to Raoult's law, the vapor pressure of the solution is directly proportional to the mole fraction of the solvent ( X₁ ). P₁ = P₁^0 X₁ Since the mole fractio

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