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Chemistry · 2025 · 2 marks
CBSE 2025 · Region 6 · Set 3 · Q17
Define osmotic pressure. Why is measurement of osmotic pressure method preferred for the determination of molar masses of macromolecules such as…
Define osmotic pressure. Why is measurement of osmotic pressure method preferred for the determination of molar masses of macromolecules such as proteins and polymers ?
Marking-scheme solution
The extra(excess) pressure applied on solution side to stop osmosis.
Because it is measured at room temperature/ molarity of the solution is used instead
of molality/its magnitude is large even for very dilute solutions.
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CBSE Class 12 Chemistry past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.