Which of the following tests is applied to differentiate between ethanal and propanal?
Correct answer: C. lodoform test
- A. Aldol condensation
- B. Cannizzaro's reaction
- C. lodoform test
- D. Lucas test
Explanation
Iodoform test, as it specifically distinguishes between ethanal and propanal by their reactions with iodine and hydroxide ions to form or not form iodoform precipitate.
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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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