The compound that does NOT liberate CO2, on treatment with aqueous sodium bicarbonate solution,
A
Carbolic acid (Phenol)
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B
Salicylic acid
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C
Benzenesulphonic acid
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D
Benzoic acid
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Solution
The correct option is A Carbolic acid (Phenol) Carbolic acid (Phenol) is weaker acid than carbonic acid and hence does not liberate CO2 on treatment with aq. NaHCO3 solution. Benzoic acid, benzenesulphonic acid and salicylic are more acidic than carbonic acid and hence will liberate CO2 with aq. NaHCO3 solution.