Question

A binary solution containing two volatile solutes A and B shows positive deviation from Raoult’s law. Which of the following statement is true?

• A. The molecular interactions between A-B are greater than those of A-A or B-B.
• B. The molecular interactions between A-B are weaker than those of A-A or B-B.
• C. There are equal molecular interactions between A-A or B-B.
• D. There are no molecular interactions between A-B compared to those of A-A and B-B.

Hint:

Mnemonic: "Positive = More pressure \(\rightarrow\) Easier to evaporate \(\rightarrow\) Weaker grip (A-B)".
"Negative = Less pressure \(\rightarrow\) Harder to evaporate \(\rightarrow\) Stronger grip (A-B)".

Answer 1

The Correct Option is B