(i) Benzene – Toluene
(ii) Water-Nitric acid
(iii) Water-Ethanol
(iv) n-Hexane – n-Heptane
Correct Answers:
(ii) Water-Nitric acid
(iii) Water-Ethanol
Explanation: In a particular composition, the Water-Nitric acid and Water-Ethanol form an azeotropic mixture with similar concentrations in the vapor phase and the aqueous phase.