IUPAC name of the following alcohol is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 2-Methylpropan-2-ol
To name an alcohol in the IUPAC system:
Choose the longest carbon chain that contains the carbon bearing the –OH group.
Replace the final “e” of the alkane name with “ol”.
Number the chain so that the –OH carbon gets the lowest number, and name the other groups as prefixes.
In the given compound, the longest chain through the –OH carbon has three carbons (propane). Both the –OH group and the extra methyl group are on C-2. So the IUPAC name is 2-methylpropan-2-ol; tert-butyl alcohol is its common name.
NCERT (2026-27 edition):
Nomenclature – …
