Bulky ketones do not react with
Correct answer: A. Sodium bisulphite
- A. Sodium bisulphite
- B. HCl
- C. Grignard reagent
- D. HCN
Explanation
The correct answer is Sodium bisulphite. Bulky ketones do not react easily with sodium bisulphite due to steric hindrance. The bulky groups in the ketones prevent the bisulphite ion from effectively approaching and reacting with the carbonyl carbon. In contrast, HCl can protonate the carbonyl oxygen, Grignard reagents can overcome steric effects due to their high reactivity, and HCN can still add to the carbonyl group to form cyanohydrins despite steric hindrance.
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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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