Question

The IUPAC name of the compound

• A. 1-chloro-4-methoxybutan-2-ol
• B. 1-chloro-4-ethoxybutan-2-ol
• C. 1-chloro-4-methoxybutan-3-ol
• D. 2-chloro-4-methoxybutan-2-ol

Answer 1

The correct option is A 1-chloro-4-methoxybutan-2-ol

Given compound contains alcohol(-OH) functional group.
substituents, -X (F, Cl, Br, I), -OR(alkoxy) are always used as prefixes.
Counting starts from where the numbering of -OH group is less thus correct numbering is Alcohols (-OH)
Suffix: ol

Ether (-OR)
Prefix: -alkoxy

Prefix for chloride is -chloro

the correct IUPAC name is 1-chloro-4-methoxybutan-2-ol