Question

most alcohols are not arrhenius bases. bases like naoh and koh have oh⁻ ions, while the defining feature of an alcohol is the ______ group.
select the correct answer below:
○ -oh⁺
○ -o⁻
○ -oh
○ -c=o

Explanation:

Alcohols are organic compounds. The functional group that defines an alcohol is the hydroxyl group, which is represented as $-\text{OH}$. In Arrhenius bases like $\text{NaOH}$ and $\text{KOH}$, the $\text{OH}^{-}$ is an ionic species. In alcohols, the $-\text{OH}$ group is covalently bonded to a carbon atom. Option A ($-\text{OH}^{+}$) is not a valid group. Option B ($-\text{O}^{-}$) is an oxide - like group and not characteristic of alcohols. Option D ($-\text{C}=\text{O}$) is the carbonyl group which is characteristic of aldehydes, ketones, etc., not alcohols.

Answer:

C. $-\text{OH}$