Answer: Propan-2-ol.
- A Ethanol
- B Methanol
- C Propan-2-ol
- D Tert-butanol
Correct answer: C. Propan-2-ol
Explanation: Propan-2-ol is a secondary alcohol and oxidises to acetone.
The phenoxide ion's negative charge spreads into the aromatic ring through resonance, lowering its energy and making phenol give up its proton more easily; an alkoxide ion (from a plain alcohol) has nowhere to delocalise the charge, making alcohols far less acidic.
Concept context
Oxygen-containing organic compounds. Understand the acidic nature of phenols, reactions of alcohols (dehydration, oxidation, esterification), and properties of ethers. Includes industrial applications and named reactions.