Ketones, when treated with LiAlH4, reduce to:
Correct answer: E. Secondary alcohol
- A. Primary alcohol
- B. Tertiary alcohol
- C. Alcohol
- D. Dihydric alcohol
- E. Secondary alcohol
Explanation
Ketones reduce to form secondary alcohols in the presence of lithium aluminum hydride (LiAlH₄). LiAlH₄ is a strong reducing agent that donates hydride ions (H⁻) to the carbonyl carbon of the ketone, resulting in the formation of the corresponding alcohol. For example, if you reduce a ketone like acetone (2-propanone), it will be converted to isopropanol (2-propanol).
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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