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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 D

Explanation:

 Plan    NaHCO3Na++HCO3

 HCO3   is decomposed by acid releasing CO2

 HCO3+H+H2O+CO2

 If acid is stronger than HCO3     then CO2 is released 

 Phenol is less acidic and thus does not liberate CO2   and NaHCO3