Question

Given below are few mixtures formed by mixing two components. Which of the following binary mixtures will have same composition in liquid and vapour phase ?
(i) Ethanol + Chloroform
(ii) Nitric acid + Water
(iii) Benzene + Toluene
(iv) Ethyl chloride + Ethyl bromide

• A. (i) and (iii)
• B. (i) and (ii)
• C. (i), (ii) and (iii)
• D. (iii) and (iv)

Answer 1

Answer: (B)

(iii) and (iv) will form ideal solutions hence do not form azeotropes. Azeotropes have same composition in liquid and vapour form when distilled.