Match List I with List II

	List-I (Mixture)	List-II (Method of separation)
A.	$\mathrm{CHCl}3$ + $C6H5\mathrm{NH}2$	(I) Distillation under reduced pressure
B.	Crude oil in petroleum industry	(II) Steam distillation
C.	Glycerol from spent-lye	(III) Fractional distillation
D.	Aniline - water	(IV) Simple distillation

Choose the correct answer from the options given below:

We have to match each mixture in List‑I with the most suitable method of separation in List‑II.

Mixture A: CHCl₃ + C₆H₅NH₂ (chloroform + aniline)

The two components are both organic liquids but their boiling points differ markedly: chloroform boils at ≈ 61 °C, whereas aniline boils at ≈ 184 °C. When the difference is large, a simple distillation would waste a lot of energy, while fractional distillation can efficiently separate a low‑boiling component from a high‑boiling one by using a column that provides many theoretical plates. Hence the appropriate method is **Fractional distillation (III)**.

$\mathrm{CHCl}3$

Mixture B: Crude oil in the petroleum industry

Crude oil consists of a very wide range of hydrocarbons with large differences in boiling points (from ≈ 30 °C up to ≈ 600 °C). When the boiling points are far apart, a **Simple distillation (IV)** is sufficient to collect the lighter fractions without the need for a long fractionating column. Therefore, crude oil is initially separated by simple distillation.

Mixture C: Glycerol from spent‑lye

This mixture is mainly water (boiling ≈ 100 °C) and glycerol (boiling ≈ 290 °C). Direct heating would decompose glycerol, so the technique used is **Steam distillation (I)**: steam carries over the low‑boiling water while glycerol remains in the residue, allowing its recovery without high temperatures.

Mixture D: Aniline + water

Aniline has a boiling point of ≈ 184 °C, far above that of water. To separate it from water without heating aniline to its high boiling point, **Steam distillation (II)** is employed. The water‑steam mixture vaporizes at 100 °C, dragging a small amount of aniline into the vapor phase, which is then condensed and collected.

Thus the correct matching is:

A��→ III, B → IV, C → I, D → II.