Verified Solution • 2025–26 Session moderate

QJEEM03Chd78d: JEE Main 2003 Chemistry - Class 12 JEEM03Chd78d Solution: In a 0.2 molal aqueous solution of a weak acid HX the degree of …

In a 0.2 molal aqueous solution of a weak acid HX the degree of ionization is 0.3. Taking kf for water as 1.85, the freezing point of the solution will be nearest to

Multiple Choice Options

  • A -0.360oC
  • B -0.260oC
  • C +0.480oC
  • D -0.480oC

Step-by-Step Verified Solution

ΔTf=Kf×m×i;

ΔTf=1.855×0.2×1.3=0.480∘C

∴ Tf=0−0.480∘C=−0.480∘C

(HX1−0.3⇌H+0.3+X−0.3,i=1.3)

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