The compound that does NOT liberate CO 2 , on treatment with aqueous sodium bicarbonate solution, is

The compound that does NOT liberate CO2, on treatment with aqueous sodium bicarbonate solution, is 
  1. Benzoic acid
  2. Benzenesulphonic acid
  3. Salicylic acid
  4. Carbolic acid (Phenol)

Solution

Except phenol, all other options are either carboxylic acids or sulphonic acids, which are comparatively strong. Phenol is a very weak acid  K a ≈ 1 0 -1 0  and  hence will not displace CO2 from NaHCO3

Asked in: JEE Advanced 2013 (Paper 1)

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