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Why are the alpha hydrogens of aldehydes and ketones acidic?
AThey are directly bonded to oxygen
BElectron withdrawal and anion resonance
CThey are the only hydrogens present
DThe molecule is ionic in nature
Answer & Solution
Correct answer: B. Electron withdrawal and anion resonance
Pulling electrons through the carbonyl group and delocalising the anion's charge onto oxygen makes loss of the proton easier.
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