50% NaOH is used in:
Correct answer: B. Cannizaro reaction
- A. Aldol condensation reaction
- B. Cannizaro reaction
- C. Clemenson condensation reaction
- D. Wolfkishner reaction
Explanation
According to PTB page 237, 50% concentrated NaOH solution is generally used in Cannizaro reaction as it is used for aldehydes which do not have α-H.
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About Reactivity of Aldehydes and Ketones
The polar carbonyl group makes aldehydes and ketones undergo nucleophilic addition, reduction and condensation reactions. Aldehydes are generally more reactive and oxidise readily to carboxylic acids, whereas ketones resist mild oxidation; reactions with hydrogen cyanide, sodium bisulfite and 2,4-DNP help identify their behaviour.
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