JEE Main 2025 Jan 23 Shift 1, Chemistry Q6: Preparation of Alkyl Halides (Halo Alkanes) & Aryl Halides (Halo Arenes)

JEE Main2025Jan 23, Shift 1Chemistry

Match the LIST-I with LIST-II

LIST-I (Name reaction)	LIST-II (Product obtainable)
A. Swarts reaction	I. Ethyl benzene
B. Sandmeyer's reaction	II. Ethyl iodide
C. Wurtz Fittig reaction	III. Cyanobenzene
D. Finkelstein reaction	IV. Ethyl fluoride

Choose the correct answer from the options given below:

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

Solution

Identify each named reaction by its characteristic transformation:

Swarts reaction converts alkyl halides to alkyl fluorides using AgF, $H g_{2} F_{2}$ , $C o F_{2}$ , or KF in DMF; e.g. $C_{2} H_{5} B r K F / D M F C_{2} H_{5} F$ (ethyl fluoride). $\Rightarrow$ A - IV.

Sandmeyer's reaction uses CuCN/KCN on a diazonium salt to install a $- C N$ group on the ring: $P h N_{2}^{+} C l^{-} \to P h C N$ (cyanobenzene). $\Rightarrow$ B - III.

Wurtz-Fittig couples an aryl halide and an alkyl halide with Na/dry ether: $P h C l + E tC l \to P h E t$ (ethyl benzene). $\Rightarrow$ C - I.

Finkelstein swaps a chloride for iodide using NaI in acetone: $E tC l N a I / a ce t o n e E t I$ (ethyl iodide). $\Rightarrow$ D - II.

$∴$ Correct match: A-IV, B-III, C-I, D-II.

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JEE Main 2025 Jan 23 Shift 1, Chemistry Q6: Preparation of Alkyl Halides (Halo Alkanes) & Aryl Halides (Halo Arenes)

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