Which of the following will not give addition reaction with NaHSO
Correct answer: D. None of the above
- A. НСНО
- B. CH3CHO
- C. CH3-CH2-CHO
- D. None of the above
Explanation
All three aldehydes listed (formaldehyde, acetaldehyde, and propionaldehyde) possess a carbonyl group (C=O) and an electrophilic carbon atom, making them reactive towards sodium bisulfite (NaHSO3). NaHSO3 readily undergoes addition reactions with such compounds, forming bisulfite adducts.Reaction Equations:Formaldehyde (HCHO):HCHO + NaHSO3 → HOCH2SO3NaAcetaldehyde (CH3CHO):CH3CHO + NaHSO3 → CH3CH(OH)SO3NaPropionaldehyde (CH3CH2CHO):CH3CH2CHO + NaHSO3 → CH3CH2CH(OH)SO3Na
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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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