Match the List-I with List-II.

List-I (Mixture)	List-II (Method of Separation)
A. CHCl3 + CH3NH2 B. Crude oil in petroleum industry C. Glycerol from spent-lye D. Aniline-water	I. Distillation under reduced pressure II. Steam distillation III. Fractional distillation IV. Simple distillation

Choose the correct answer from the options given below.

The correct option is A-IV, B-III, C-I, D-II.

Let us analyze the matching pair by pair based on the principles of organic purification and separation techniques:

1. CHCl₃ + CH₃NH₂ (Chloroform and Methylamine) matches with IV (Simple distillation):
Simple distillation is used to separate liquids that have a sufficiently large difference in their boiling points. Chloroform has a boiling point of approximately 334 K (61.5 °C) while methylamine is a gas at room temperature with a boiling point of 266.3 K (-6.7 °C). Due to this significant difference in boiling points, they can be easily separated using simple distillation.

2. Crude oil in petroleum industry matches with III (Fractional distillation):
Crude oil contains a complex mixture of many hydrocarbons whose boiling points are very close to one another. When the difference in boiling points of the liquids is small (typically less than 25 K), fractional distillation is employed. A fractionating column is used to vaporize and condense the components repeatedly, allowing them to separate into different fractions like petrol, diesel, kerosene, etc.

3. Glycerol from spent-lye matches with I (Distillation under reduced pressure):
Glycerol has a high boiling point (563 K or 290 °C) and decomposes at or near its boiling point. For organic liquids that decompose at temperatures below or near their normal boiling points, distillation under reduced pressure (or vacuum distillation) is used. Lowering the pressure reduces the boiling point of the liquid, allowing glycerol to distill over at a lower temperature without decomposing.

4. Aniline-water matches with II (Steam distillation):
Steam distillation is used to separate substances that are steam volatile and immiscible with water. Aniline is immiscible with water and has a high vapor pressure in steam (it is steam volatile). Passing steam through the mixture allows aniline to vaporize at a temperature much lower than its normal boiling point (which is 457 K) and condense along with water, after which they can be easily separated using a separating funnel.

Conclusion:
By matching the mixtures with their respective methods of separation, we obtain:
• A matches with IV
• B matches with III
• C matches with I
• D matches with II