Question

What type of deviation is shown by phenol and anelene?

Answer 1

The deviations are caused due the difference in attractive forces between the molecules.Let us consider we are mixing 2 chemicals – A & B,let the attraction between A-A molecules in pure A solution & B-B molecules in pure B solution is less then the attraction between A-B in the mixture.This causes decrease in volume and ‘-‘ve deviation. ‘+’ve deviantion is caused if A-B attractive force is weak. The difference in attractive force is due to various factors like Hydrogen bonding,dipole-dipole attraction etc.