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ChemistryNEET 2025Colligative properties

Solutions

Which of the following aqueous solutions will exhibit the highest boiling point?

  1. A.0.01 M urea
  2. B.0.01 M KNO3\mathrm{KNO_3}
  3. C.0.01 M Na2SO4\mathrm{Na_2SO_4}✓
  4. D.0.015 M C6H12O6\mathrm{C_6H_{12}O_6}

Solution

Boiling-point elevation depends on the total particle concentration iCiC. Urea: 0.010.01. KNO3\mathrm{KNO_3}: 2×0.01=0.022 \times 0.01 = 0.02. Na2SO4\mathrm{Na_2SO_4}: 3×0.01=0.033 \times 0.01 = 0.03. Glucose: 0.0150.015. Na2SO4\mathrm{Na_2SO_4} boils highest.

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