Question

What type of deviation from Rauolt’s law is exhibited by a mixture of phenol and aniline? Explain with the help of graph.

Answer 1

Negative deviation.

In this case the intermolecular hydrogen bonding between phenolic proton and lone pair on nitrogen atom of aniline is stronger than the respective intermolecular hydrogen bonding between similar molecules. Thus, escaping tendency of the particles decreases in solution and hence the liquid mixture shows negative deviation.