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Chemistry · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 3 · Q12
1 mole of liquid A and 2 moles of liquid B make a solution having a total vapour pressure 40 torr. The vapour pressure of pure A and pure B are 30…
$\displaystyle 1$ mole of liquid A and $\displaystyle 2$ moles of liquid B make a solution having a total vapour pressure $\displaystyle 40$ torr. The vapour pressure of pure A and pure B are $\displaystyle 30$ torr and $\displaystyle 45$ torr respectively. The above solution :
Official answer
(A)
is an ideal solution
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CBSE Class 12 Chemistry past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.