For distinguishing phenol and acetic acid we required to react (treat) them

For distinguishing phenol and acetic acid we required to react (treat) them with

(a) Na₂CO₃
(b) NaOH
(c) HCl
(d) NaHCO₃

NaHCO₃

Acetic acid on treatment with NaHCO₃ evolves CO₂, however no such reaction occurs with phenol. CH₃COOH + NaHCO₃ → CH₃COONa + CO₂↑ + H₂O.

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