Organic Chemistry MCAT Practice Exam 2025 – The All-in-One Guide to Master Your Test Preparation!

Question: 1 / 400

What is the primary product of the oxidation of a primary alcohol?

Ketone

Aldehyde

When a primary alcohol undergoes oxidation, the primary alcohol is converted to an aldehyde as the first product. This transformation involves the removal of two hydrogen atoms: one from the hydroxyl (-OH) group and another from the carbon atom bonded to the hydroxyl group.

This reaction typically utilizes gentle oxidizing agents such as pyridinium chlorochromate (PCC) that selectively oxidize primary alcohols, stopping at the aldehyde stage rather than proceeding to complete oxidation. Under stronger or prolonged oxidizing conditions, primary alcohols can indeed be oxidized further to form carboxylic acids, but the primary product, before any further oxidation can occur, is the aldehyde.

Understanding this progression in oxidation reactions is key in organic chemistry, as it relates to functional group transformations and the behavior of alcohols under various chemical conditions.

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Carboxylic acid

Alcohol

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