Concept:The position of the hydroxyl group dictates the product of oxidation because it dictates how many alpha-hydrogens are available for removal.
Formula:$$ \text{R}_2\text{CH-OH} + [O] \longrightarrow \text{R}_2\text{C=O} + \text{H}_2\text{O} $$
Solution:- A secondary alcohol has the -OH group attached to a carbon that is bonded to two other carbons, leaving exactly one alpha-hydrogen.
- Oxidation removes this alpha-hydrogen and the hydroxyl-hydrogen.
- The resulting functional group is a carbon-oxygen double bond flanked by two alkyl groups, which strictly defines a ketone.
Why other options are incorrect:Carboxylic acids are the final oxidation product of primary alcohols. Ethers are formed via dehydration. Phenol is an aromatic ring that does not result from aliphatic alcohol oxidation.
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