Question

On the basis of information given below mark the correct option.
Information:
(I) In bromoethane and chloroethane mixture intermolecular interactions of $A-A$ and $B-B$ type are nearly same as $A-B$ type interactions. (II) In ethanol and acetone mixture $A-A$ or $B-B$ type intermolecular interactions are stronger than $A-B$ type interactions.
(III) In chloroform and acetone mixture $A-A$ or $B-B$ type intermolecular interactions are weaker than $A-B$ type interactions.

• A. Solution (II) and (III) will follow Raoult’s law
• B. Solution (I) will follow Raoult’s law
• C. Solution (II) will show negative deviation from Raoult’s law
• D. Solution (III) will show positive deviation from Raoult’s law

Answer 1

Answer: (B)

Mixture of bromoethane and chloroethane is an ideal solution and will follow Raoults law as intermolecular interactions of $A-A$ and $B-B$ type are nearly same as $A-B$ type interactions.