CBSE Class 12 Chemistry 2023 Delhi Set 1 Solved Paper

Question : 7 of 35

Marks: +1, -0

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 45 torr and 30 torr respectively. The above solution

Solution:

Explanation: Shows negative de viation. because

A-B

forces of attraction are higher than

{A}-{A}

and

{B}-{B}

components.

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