Which of the following aldehyde contains $α$ - carbon atom but does not have any $α$ - hydrogen atom?

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Propionaldehyde

Isobutyraldehyde

Benzaldehyde

Formaldehyde

answer is B.

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Detailed Solution

The carbon which is directly attached to a functional group is called an alpha-carbon atom and hydrogen atoms attached to this carbon directly are called alpha-hydrogen atoms.

Therefore, the correct answer is option (B) Benzaldehyde.

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