NEETChemistrySolutions
Assertion A : A liquid mixture of chloroform and acetone forms a minimum boiling azeotrope at a specific composition. Reason R : The intermolecular attractive forces between chloroform and acetone molecules are stronger than those present in the pure liquids. In the light of the above statements, choose the most appropriate answer from the options given below.
Options
- ABoth A and R are correct and R is the correct explanation of A
- BBoth A and R are correct but R is NOT the correct explanation of A
- CA is correct but R is not correct
- DA is not correct but R is correct
Correct answer
D. A is not correct but R is correct
Step-by-step solution
For a mixture of chloroform and acetone, the intermolecular attractive forces between chloroform and acetone molecules (due to hydrogen bonding) are stronger than those in the pure liquids. This leads to a negative deviation from Raoult's law. Thus, Reason R is correct. Solutions that show a large negative deviation from Raoult's law form maximum boiling azeotropes at a specific composition, not minimum boiling azeotropes. Thus, Assertion A is not correct. Therefore, A is not correct but R is correct. Answer: A is