Which of the following shows positive deviation from Raoult's law ?

Explanation

(i) Let us consider the positive deviation shown by a solution of ethyl alcohl and water.
(ii) In this solution, the hydrogen bonding interaction between ethnol and water is weaker than those hydrogen bonding interactions amongst themselves (ethyl alcohol-ethyl alcohol and water-water interaction).
(iii) This results in the increased evaporation of both components from the aqueous solution of ethanol
(iv) Here, the mixing process is endothermic i.e., `Delta H _("mixing") gt 0` and there will bge a slight increase in volume `(Delta V_("mixing")gt 0)`

Vapout pressure diagram showing positive deviation