1) The compound that does not liberate CO2, on treatment with aqueous sodium bicarbonate solution is A) benzoic acid B) benzenesulphonic acid C) salicylic acid D) Carbolic acid (phenol) Answer: Option DExplanation: Plan NaHCO3⇌Na++HCO−3 HCO−3 is decomposed by acid releasing CO2 HCO−3+H+→H2O+CO2 If acid is stronger than HCO−3 then CO2 is released Phenol is less acidic and thus does not liberate CO2 and NaHCO3