Question:
Which colligative property is used to determine molar mass of polymers?
Which colligative property is used to determine molar mass of polymers?
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High mass polymers need big pressure! Use Osmotic pressure because it gives measurable results at room temperature.
Updated On: May 5, 2026
- Boiling point elevation
- Freezing point depression
- Osmotic pressure
- Vapour pressure lowering
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Colligative properties depend on the number of solute particles in a solution.
Step 2: Meaning
For macromolecules like polymers, which have very high molar masses, the changes in boiling point or freezing point are too small to measure accurately at room temperature.
Step 3: Analysis
Osmotic pressure measurements are carried out at room temperature and yield significant, measurable values even for dilute solutions of polymers.
Step 4: Conclusion
Therefore, osmotic pressure is the preferred colligative property for determining the molar mass of polymers. Final Answer: (C)
Colligative properties depend on the number of solute particles in a solution.
Step 2: Meaning
For macromolecules like polymers, which have very high molar masses, the changes in boiling point or freezing point are too small to measure accurately at room temperature.
Step 3: Analysis
Osmotic pressure measurements are carried out at room temperature and yield significant, measurable values even for dilute solutions of polymers.
Step 4: Conclusion
Therefore, osmotic pressure is the preferred colligative property for determining the molar mass of polymers. Final Answer: (C)
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