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NEET 2025
Exam
NEET
Year
2025
Subject
Chemistry
Chapter
Solutions

NEET 2025 · Chemistry · Solutions

Which of the following aqueous solution will exhibit highest...

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

Options

  1. A0.01 M Urea
  2. B0.01 M KNO3\mathrm{KNO}_3
  3. C0.01 M Na2SO4\mathrm{Na}_2 \mathrm{SO}_4
  4. D0.015 M C6H12O6\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6

Correct answer

C. 0.01 M Na2SO4\mathrm{Na}_2 \mathrm{SO}_4

Step-by-step solution

ΔTb=i Kb m\Delta \mathrm{T}_{\mathrm{b}}=\mathrm{i} \mathrm{~K}_{\mathrm{b}} \mathrm{~m} - Consider m≈M\mathrm{m} \approx \mathrm{M} - Kb\mathrm{K}_{\mathrm{b}} same for all i×M\mathrm{i} \times \mathrm{M} (1) 1×0.01=0.011 \times 0.01=0.01 (2) 2×0.01=0.022 \times 0.01=0.02 (3) 3×0.01=0.033 \times 0.01=0.03 (4) 1×0.015=0.0151 \times 0.015=0.015 iM↑⇒Δ Tb↑⇒ Tb↑\mathrm{iM} \uparrow \Rightarrow \Delta \mathrm{~T}_{\mathrm{b}} \uparrow \Rightarrow \mathrm{~T}_{\mathrm{b}} \uparrow
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