(i) Test with NaHCO3 solution in water'
On adding carboxylic acid to baking soda, carbon dioxide is liberated with brisk effervescence. On adding a solution of baking soda to alcohol, no brisk effervescence occurs.
(ii) Test with blue litmus solution.
Carboxylic acid turns blue litmus red' There is no change in colour when a blue litmus solution is added to alcohol.
