Bisulfite addition product when heated with mineral acid yields?
Correct answer: C. Starting material from which it is formed
- A. Carboxylic acid
- B. Alpha hydroxy acid
- C. Starting material from which it is formed
- D. Alpha beta unsaturated compound
Explanation
Aldehydes and small methyl ketones react with a saturated aqueous solution of sodium bisulfate to form a Crystalline white ppt of sodium bisulfite addition product adduct. When heated with dilute mineral acids (e.g. HCl or sulphuric acid), the bisulfite regenerates the parent Aldehyde or ketone.The reaction is used for the separation and purification of carbonyl compounds from non-carbonyl compounds such as alcohol.See the image below:
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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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