Home › Maharashtra HSC Class 12 (Science) › chemistry › Solutions › Which colligative property is most suitable for …
Which colligative property is most suitable for determining the molar mass of macromolecules such as proteins?
ABoiling point elevation
BOsmotic pressure
CFreezing point depression
DVapour pressure lowering
Answer & Solution
Correct answer: B. Osmotic pressure
1. Macromolecules have very high molar mass, so molal concentrations are tiny.
2. ΔT_b and ΔT_f changes are then too small to measure reliably.
3. Osmotic pressure is measurable even at very low molar concentrations, making it the standard method.
_Source: Maharashtra Balbharati Std XII Chemistry, Ch 2 "Solutions" §2.9_
Related questions
The mass of NaOH (M = 40 g/mol) required to prepare 500 mL of a 0.20 M NaOH solution isWhich of these solutions will boil at the highest temperature at 1 atm?The molality of a 1 M aqueous NaCl solution (density = 1.04 g/mL, NaCl M = 58.5 g/mol) is Osmotic pressure π of a dilute solution obeys π = C R T. Here C representsVan't Hoff factor i > 1 for a solute indicatesA negative deviation from Raoult law is expected whenIf a solute dimerises in solution, its observed molar mass compared with the calculated vaWhich of the following is NOT a colligative property?