The correct option is A Solvent-solute interactions less than the solvent-solvent and the solute-solute interactions
Liquids showing positive deviation will have total vapour pressure more than what it should be according to Raoult's Law This is because, solvent-solute interaction is less than the solvent-solvent and the solute-solute interactions
PT>p∘AχA+p∘BχB
Liquids showing negative deviation will have total vapour pressure less than what it should be according to Raoult's Law. This is because solvent-solute interaction is more than the solvent-solvent and the solute-solute interactions
PT<p∘AχA+p∘BχB
An ideal soluton follows Raoult Law.
Here,
PT=p∘AχA+p∘BχB
Here , solvent-solute interaction is equal to the solvent-solvent and the solute-solute interactions.