Concept:Alkanols are classified by the number of alkyl groups attached to the carbon bearing the hydroxyl group.
Explanation:Alkanols are grouped as primary, secondary, or tertiary alcohols.
This grouping depends on how many alkyl groups are directly bonded to the carbon atom that carries the
−OH group.
A primary alkanol has one alkyl group on that carbon.
A secondary alkanol has two alkyl groups on that carbon.
A tertiary alkanol has three alkyl groups on that carbon.
Thus, classification is based on the number of alkyl groups attached to the hydroxyl-bearing carbon.
Answer:D. number of alkyl groups bonded to the carbon having the hydroxyl group.