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Q.
An oxygen containing organic compound upon oxidation forms a carboxylic acid as the only organic product with its molecular mass higher by $14$ units. The organic compound is
Because the difference in mass between $- CH _{2} OH$ group and $- COOH$ group is 14 , thus the compound which undergoes oxidation is a primary alcohol. $\left(- CH _{2} OH\right.$ is the functional group of primary alcohols.)