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ChemEasyMain 2026 • 5th Apr - Shift 2

Match Organic Purification Techniques with Their Applications

Match List - I with List - II.

List - IList - IIPurification techniqueUsed to separateA. Simple distillationI. Steam volatile compoundB. Fractional distillationII. Two liquids with large difference in boiling pointsC. Steam distillationIII. Liquid decomposing at its boiling pointD. Distillation under reduced pressureIV. Two liquids with close boiling points\begin{array}{ll} \text{List - I} & \text{List - II} \\ \text{Purification technique} & \text{Used to separate} \\ \text{A. Simple distillation} & \text{I. Steam volatile compound} \\ \text{B. Fractional distillation} & \text{II. Two liquids with large difference in boiling points} \\ \text{C. Steam distillation} & \text{III. Liquid decomposing at its boiling point} \\ \text{D. Distillation under reduced pressure} & \text{IV. Two liquids with close boiling points} \end{array}

Choose the correct answer from the options given below :

Options

A

A-II, B-III, C-I, D-IV

B

A-II, B-IV, C-I, D-III

Correct
C

A-II, B-IV, C-III, D-I

D

A-IV, B-III, C-II, D-I

Topics & Concepts

Organic Chemistry - Basic PrinciplesIUPAC Nomenclature

Step-by-Step Solution

To determine the correct matching between the purification techniques in List - I and their corresponding applications in List - II, we analyze each technique based on fundamental principles of organic chemistry purification:

  1. Simple Distillation (A): This method is used for the separation of components of a mixture containing two miscible liquids that have a large difference in their boiling points (typically greater than 25 K25\,\text{K}) without decomposition.

    • Thus, A matches with II.

  2. Fractional Distillation (B): This technique is employed when the boiling points of the two miscible liquids are very close to each other (close boiling points). A fractionating column is used to facilitate repeated condensation and vaporisation cycles.

    • Thus, B matches with IV.

  3. Steam Distillation (C): This method is applied to separate substances that are steam volatile and immiscible with water (such as aniline or essential oils), allowing them to vaporize at a temperature lower than their normal boiling points.

    • Thus, C matches with I.

  4. Distillation Under Reduced Pressure (D): This method (vacuum distillation) is used to purify liquids that have very high boiling points or those that decompose at or below their normal boiling points (e.g., glycerol). Reducing the pressure lowers the boiling point of the liquid, preventing decomposition.

    • Thus, D matches with III.

Combining all the correct pairs:

  • A →\rightarrow II
  • B →\rightarrow IV
  • C →\rightarrow I
  • D →\rightarrow III

This corresponds to the combination: A-II, B-IV, C-I, D-III.

Correct Option: B

Match Organic Purification Techniques with Their Applications | Chemistry PYQ Solution - JEE Challenger