JEE · NEET Previous Year Question

Which among the following colligative properties is useful to determine molar masses of very expensive solutes?

Topic: JEE PYQ

Answer: B. Full step-by-step solution below.

  1. AFreezing point depression
  2. BOsmotic pressure
  3. CVapour pressure lowering
  4. DBoiling point elevation

Correct answer: B

Solution

(b) : As compared to other colligative properties, the magnitude of osmotic pressure is large even for very dilute solutions. The osmotic pressure can be measured at a suitable constant temperature and the molar masses can be measured far more accurately. Therefore, osmotic pressure is more useful to determine molar masses of very expensive solutes.

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