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Chemistry · 2025 · 2 marks
CBSE 2025 · Region 6 · Set 2 · Q17
State Raoult's law for a solution containing volatile components. Why is the vapour pressure of an aqueous solution of glucose lower than that of…
State Raoult's law for a solution containing volatile components. Why is the vapour pressure of an aqueous solution of glucose lower than that of water?
Marking-scheme solution
•
The partial vapour pressure of each component of the solution is directly
proportional to its mole fraction present in solution.
•
Because glucose decreases the surface area and hence decreases the escaping
tendency of water
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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.