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CH3CHO and C6H5CH2CHO can be distinguished chemically by:

1. Benedict test
2. Iodoform test
3. Tollen’s reagent test
4. Fehling solution test

Correct answer: Iodoform test

Solution

CH3CHO (acetaldehyde) gives a positive iodoform test due to the presence of a methyl group attached to the carbonyl carbon, while C6H5CH2CHO (benzaldehyde derivative) does not. This makes the iodoform test the distinguishing test.

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