NEETChemistryGeneral Organic Chemistry
Consider the following physical properties of four hypothetical organic liquids P, Q, S, and T: Liquid P: Boiling point 350 K , miscible with Q. Liquid Q: Boiling point 360 K , miscible with P. Liquid S: Boiling point 500 K , decomposes at 480 K . Liquid T: Boiling point 457 K , immiscible with water, steam volatile. Based on the above data, choose the correct statement regarding their most appropriate purification t
Options
- AA mixture of P and Q is separated by simple distillation, and liquid S is purified by fractional distillation.
- BA mixture of T and water is separated by fractional distillation, and liquid S is purified by simple distillat
- CA mixture of P and Q is separated by simple distillation, and a mixture of T and water is separated by steam d
- DA mixture of P and Q is separated by fractional distillation, and liquid S is purified by distillation under r
Correct answer
D. A mixture of P and Q is separated by fractional distillation, and liquid S is purified by distillation under r
Step-by-step solution
Liquids P and Q are miscible and have a boiling point difference of only 10 K ( 360 K - 350 K ). Mixtures of miscible liquids with a small boiling point difference are separated using fractional distillation, not simple distillation. Liquid S has a normal boiling point of 500 K but decomposes at 480 K (below its boiling point). Such liquids are purified by distillation under reduced pressure (vacuum distillation) to prevent thermal decomposition. Liquid T is immiscible with water and is steam volatile, which are th