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Aldehydes and Ketones Alpha Hydrogen in Aldehydes

1

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In which aldehydes are α-hydrogen atoms absent? (1) Methanal (2) Ethanal (3) Benzaldehyde (4) 2,2-Dimethylpropanal

Verified Answer & Explanation⌄

Correct Answer: B) 1, 3 and 4 only

Concept Explanation

Methanal has no α-carbon, benzaldehyde has no α-hydrogen on the carbon adjacent to –CHO, and the α-carbon of 2,2-dimethylpropanal has no hydrogen.

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