question_answer 78)

  On the basis of information given below mark the correct option. Information On adding acetone to methanol some of the hydrogen bonds between methanol molecules break. (a) At specific composition methanol ? acetone mixture will from minimum boiling azeotrope and will show positive deviation from Raoult?s law (b) At specific composition methanol ? acetone mixture will from maximum boiling azeotrope and will show positive deviation from Raoult?s law (c) At specific composition methanol ? acetone mixture will from minimum boiling azeotrope and will show negative deviation from Raoult?s law (d) At specific composition methanol ? acetone mixture will from maximum boiling azeotrope and will show negative deviation from Raoult?s law

Answer:

                  (a) At specific composition methanol ? acetone mixture will from minimum boiling azeotrope and will show positive deviation. This is due to weaker A ? B interaction than A ? A or B ? B interaction i.e., A ? B < A ? A and B ? B