Answer:
These question is incomplete
Step-by-step explanation:
There are three classes of alcohol, which are
Primary Alcohol: An alcohol that has just one alkyl group or carbon chain attached to the carbon holding the hydroxyl group. For example, Butanol (structure formula below)
OH-CH₂CH₂CH₂CH₃
From the above, it can be discovered that the carbon carrying the hydroxyl group (OH)is only attached to just one other carbon chain. The second type of alcohol referred to in the question fits this
Secondary Alcohol: This is an alcohol that has two alkyl groups or carbon chains attached to the carbon holding the hydroxyl group. For example, 2-hexanol (structural formula below)
CH₃CH(OH)CH₂CH₂CH₂CH₃
From the above, it can be seen that the second carbon is the carbon holding the functional group and it's also attached to a methyl group (to the left) and a butyl group (to the right).
Tertiary alcohol: This is an alcohol that has three alkyl groups or carbon chains attached to the carbon holding the hydroxyl group. For example, 2-methylpropan-2-ol
CH₃
|
H₃C - C - CH₃
|
OH
From the above, it can be seen that the central carbon is the caron holding the hydroxyl group and it's also attached to three other methyl groups. This is the first description provided in the question.