**Order of acidity** of phenol, water, ethanol:
APhenol > water > ethanol
BEthanol > water > phenol
CWater > phenol > ethanol
DAll equal
Answer & Solution
Correct answer: A. Phenol > water > ethanol
pKa values: phenol 10.0; water 15.7; ethanol 15.9. So acidity: phenol > water > ethanol. Conjugate-base stability: PhO⁻ (resonance) > OH⁻ > EtO⁻ (+I from ethyl destabilises).
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