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A solution of Chloroform (CHCl3) and Acetone ((CH3)2CO) exhibits a negative devi

ID: 742511 • Letter: A

Question

A solution of Chloroform (CHCl3) and Acetone ((CH3)2CO) exhibits a negative deviation from Roult's law. The result implies that
A. Chloroform-Chloroform interactions are stronger than Chloroform-Acetone interactions.
B. Chloroform-Chloroform interactions are weaker than Chloroform-Acetone interactions.
C. Acetone-Acetone interactions are stronger than Chloroform-Acetone interactions.
D. Acetone-Acetone interactions are weaker than Chloroform-Acetone interactions.
E. Chloroform-Chloroform interactions are weaker than Chloroform-Acetone interactions AND Acetone-Acetone interactions are weaker than Chloroform-Acetone interactions.

Explanation / Answer

Negative deviations from Raoult's law are observed when the forces between the particles of the mixture are stronger than the forces between the particles in the pure liquids. Therefore, if a solution of Chloroform (CHCl3) and Acetone ((CH3)2CO) exhibits a negative deviation from Roult's law. Then, chloroform-chloroform interactions must be weaker than chloroform-acetone interactions and acetone-acetone interactions must be weaker than Chloroform-Acetone interactions.

Option E is the correct answer

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