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KCET2018ChemistrySolutions

Which of the following aqueous solutions should have the highest boiling point?

Options

  1. A( 1.0 M NaOH )
  2. B( 1.0 M Na ₂ SO ₄ )
  3. C( 1.0 M NH ₄ NO ₃ )
  4. D( 1.0 M KNO ₃ )

Correct answer

B. ( 1.0 M Na ₂ SO ₄ )

Step-by-step solution

Colligative property is an extensive property which depend on the number of moles of solute particles. array |l|c| Aqueous Solution & Number of Particles NaOH Na ⁺+ OH ⁻ & 2 Na ₂ SO ₄ 2 Na ⁺+ SO ₄²⁻ & 3 NH ₄ NO ₃ NH ₄⁺+ NO ₃⁻ & 2 KNO ₃ K ⁺+ NO ₃⁻ & 2 array Since, the concentration of the all compounds are same, therefore, compound having maximum no. of ions, that is, Na ₂ SO ₄ will have highest boiling point.

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