Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Haloalkanes and Haloarenes

Question:

Match List-I with List-II

List-I Common name

List-II IUPAC name

(A) Vinyl Chloride

(I) 1-Chloro-2-methylbenzene

(B) Chloroform

(II) Dichloromethane

(C) Methylene chloride

(III) Trichloromethane

(D) o-Chlorotoluene

(IV) Chloroethene

Choose the correct answer from the options given below:

Options:

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

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

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

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

Correct Answer:

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

Explanation:

The correct answer is Option (3) → (A)-(IV), (B)-(III), (C)-(II), (D)-(I)

List-I Common name

List-II IUPAC name

(A) Vinyl Chloride

(IV) Chloroethene

(B) Chloroform

(III) Trichloromethane

(C) Methylene chloride

(II) Dichloromethane

(D) o-Chlorotoluene

(I) 1-Chloro-2-methylbenzene

(A) Vinyl Chloride — (IV) Chloroethene

Vinyl chloride is the common name for the simplest chloro-substituted alkene. Its IUPAC name is derived from the parent chain (ethene) and the substituent (chloro), resulting in chloroethene.

(B) Chloroform — (III) Trichloromethane

Chloroform is a classic trihalomethane. Since it contains three chlorine atoms substituted on a single methane carbon, its systematic IUPAC name is trichloromethane.

(C) Methylene chloride — (II) Dichloromethane

The term "methylene" refers to the $-CH_2-$ group. When two chlorine atoms are attached to this group, the common name is methylene chloride, while the IUPAC name is dichloromethane.

(D) o-Chlorotoluene — (I) 1-Chloro-2-methylbenzene

In IUPAC nomenclature for substituted benzenes, substituents are listed alphabetically. "Chloro" (C) comes before "Methyl" (M). The carbon with the chlorine is assigned position 1, and the methyl group at the ortho position is assigned position 2, leading to 1-chloro-2-methylbenzene.