Solutions and Colligative PropertiesmediumMCQ SINGLE

Given below are few mixtures formed by mixing two components. Which of the following binary mixturesSolutions and Colligative Properties Chemistry Question

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

Answer: B

💡 Solution & Explanation

The question is indirectly asking which binary mixture will form, azeotrope (i) and (ii) form azeotrope (iii) and (iv) do not. In option a A-B interactions are stronger then A-A and B-B interactions present in the given 2 liquids forming the solution. Due to stronger A-B interactions, the escaping tendency of A and B types of molecules from the solution have a partial pressure less than expect on bases of Raoult’s Law. The interaction between 2 H O and 3 HNO is stronger than the interaction between 3 3 HNO HNO and 2 2 H O H O due to hydrogen bonding. Thus it shows negative deviation fro

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