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The elevation in boiling point of a solution of a solution d T b is related with molality of solution (m) by the relation d T b = R T b 2 Δ Η v a p M 1 1 + m M 1 , where M 1 is molar mass of solvent and ∆ H v a p is heat of vaporization of solvent. For a dilute solution, the relation ∂ T b ∂ m m → 0 gives:

Options

  1. AMolal ebullioscopic constant
  2. BElevation in boiling point
  3. CBoiling point of solvent
  4. DElevation in boiling point (ΔT b ) becomes more predominant

Correct answer

A. Molal ebullioscopic constant

Step-by-step solution

∂ T b ∂ m m → 0 = R T b 2 M 1 Δ Η v a p = K b .

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