The correct option is A A- q; B- s, t; C- r, u; D- p
(A) C6H6+C6H5CH3 forms a nearly ideal solution. Both are aromatic hydrocarbons and have similar structure and similar intermolecular forces.
(B) Acetone +C2H5OH forms a solution showing positive deviation. New interactions are weaker than the interactions in pure components. For such solutions, ΔH and ΔV are positive.
(C) C6H6+CHCl3 forms a solution showing negative deviation. New interactions are stronger than the interactions in pure components. For such solutions, Δ H and Δ V are positive.
(D) H2O+C2H5OH forms an azeotropic mixture. It is constant boiling mixture. Two liquids cannot be separated by simple distillation.