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Acetic acid is weaker than formic acid because its methyl group
AAdds resonance to the anion
BForms hydrogen bonds with water
CWithdraws electrons by -I effect
DReleases electrons by +I effect
Answer & Solution
Correct answer: D. Releases electrons by +I effect
The electron-releasing methyl group raises electron density on oxygen and hinders loss of the proton, lowering ionisation.
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