Identify the compound, which gives positive iodoform test:
Correct answer: B. Methyl ketone
- A. Methanol
- B. Methyl ketone
- C. 3-Hexanol
- D. Propionaldehyde
Explanation
When a methyl ketone is halogenated in a basic solution, the halogen replaces all three α-hydrogen atoms. This trihalomethane reacts further, resulting in the cleavage of a carbon-carbon bond. After acidification, the products are carboxylic acid and trihalomethane known as a haloform.
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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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