MCQChemistry

NCERT · Class 12 · Chemistry · SolutionsWhich of the following aqueous solutions should have the highest boiling point?

Step-by-Step Solution

Boiling point elevation is a colligative property directly proportional to the van't Hoff factor ($i$) and molality. $1\text{ M NaOH}$ dissociates into 2 ions ($i=2$), $1\text{ M Na}_2\text{SO}_4$ into 3 ions ($i=3$), $1\text{ M NH}_4\text{NO}_3$ into 2 ions ($i=2$), and $1\text{ M KNO}_3$ into 2 ions ($i=2$). Therefore, $\text{Na}_2\text{SO}_4$ gives the highest number of particles, leading to the highest boiling point.

Detailed Options Breakdown
Option : 1 M NaOH

Incorrect choice. This distractor represents a common misunderstanding of the core principles of Solutions.

Option 1: 1 M Na2SO4 (Correct Answer)

Correct choice. Refer to the step-by-step verified solution guidelines above for details.

Option 2: 1 M NH4NO3

Incorrect choice. This distractor represents a common misunderstanding of the core principles of Solutions.

Option 3: 1 M KNO3

Incorrect choice. This distractor represents a common misunderstanding of the core principles of Solutions.

💡 Study Guide: This question tests core syllabus concepts from Solutions. For formulas, key summaries, and mock exam reference guides, read the full Solutions Revision Notes.
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