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Medical Chemistry Practice Test

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RCH2OH represents which class of alcohol?
Correct Answer:
Primary
Explanation:
Alcohols are classified by how many carbon groups are attached to the carbon that bears the hydroxyl group. In RCH2OH, the carbon with the OH is a CH2 group, bonded to one carbon-containing R group and to two hydrogens. That means there is only one carbon attached to the carbon bearing the OH, which makes it a primary alcohol. If the OH-bearing carbon were attached to two carbons, it would be secondary; attached to three carbons would be tertiary. A quaternary carbon cannot bear an OH group because it lacks hydrogens. So RCH2OH is a primary alcohol.

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