Match List-I with List-II
| List-I | List-II |
| Structure of Alkyl/Aryl Halide | Common Name |
(A)  | (I) Vinylic halide |
(B)  | (II) Benzylic halide |
| (C) CH3-CHCl2 | (III) Allylic halide |
| (D) CH2= CH-CH2Cl | (IV) Alkylidene halide |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
Halides are named by the kind of carbon atom that carries the halogen:
Vinylic halide: X on an sp2 carbon of a C=C double bond (>C=C<X).
Allylic halide: X on an sp3 carbon next to a C=C double bond (\( \ce{C=C-CH2X} \)).
Benzylic halide: X on an sp3 carbon next to a benzene ring (\( \ce{C6H5-CH2X} \)).
Alkylidene halide (gem-dihalide): two halogen atoms on the same carbon atom.
(A) Structure A — This matches (I) Vinylic halide. The halogen is attached directly to a doubly bonded carbon of the ring.
(B) Structure B — This matches (II) Benzylic halide. The halogen is on the \( \ce{CH2} \) carbon joined to the benzene ring.
(C) \( \ce{CH3} \)-\( \ce{CHCl2} \) — This matches (IV) Alkylidene halide. Both chlorine atoms are on the same carbon; its common name is ethylidene chloride (1,1-dichloroethane).
(D) \( \ce{CH2} \)= CH-\( \ce{CH2Cl} \) — This matches (III) Allylic halide. The chlorine is on the \( \ce{CH2} \) carbon next to the C=C double bond; its common name is allyl chloride (3-chloropropene).