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When an ideal binary solution is in equi...

When an ideal binary solution is in equilibrium with its vapour, molar ratio of the two components in the solution and in the vapur phase is :

A

same boiling point but different freezing point

B

Different

C

May or may not be same depending upon volatile nature of the two components

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
C

Volalite nature `uparrow`. Vapour pressure increases, fraction in vapour phase increases.
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A solution of A and B with 30 mol % A is in equilibrium with its vapour which contains 40 mol% % B. Assuming that the solution and the vapour behave ideally, calculate the ratio of vapour pressure of pure A and pure B.

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