Number of alpha hydrogens in Benzaldehyde are
Correct answer: B. Zero
- A. 3
- B. Zero
- C. 1
- D. 2
Explanation
An alpha hydrogen is a hydrogen atom that is bonded to a carbon atom that is directly bonded to a carbonyl group. In benzaldehyde, the carbonyl group is bonded to a carbon atom that is part of the benzene ring. This carbon atom is not bonded to any hydrogen atoms, so there are no alpha hydrogens in benzaldehyde.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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