Bisulphite adduct can regenerate carbonyl compounds ....
Correct answer: C. HCI + ∆
- A. NaOH + ∆
- B. Na2CO3
- C. HCI + ∆
- D. Ag + ∆
Explanation
When a carbonyl compound reacts with sodium bisulfite (NaHSO3) in the presence of hydrochloric acid (HCl) and heat, it forms a bisulfite adduct. This adduct is stable under the reaction conditions.However, when the bisulfite adduct is treated with hydrochloric acid and heated, it undergoes a reaction called "delta(heat)" or thermal decomposition. This reaction leads to the regeneration of the original carbonyl compound.The thermal decomposition of the bisulfite adduct occurs because of the acidic conditions and the heat applied. These conditions break the bond between the carbonyl compound and the bisulfite group, resulting in the release of sulfur dioxide gas (SO2) and the regeneration of the carbonyl compound.So, in summary, the reaction HCl + delta(heat) helps in regenerating the carbonyl compound from its bisulfite adduct by breaking the bond and releasing sulfur dioxide gas.
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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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