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Carbon and Its Compound
How would you distinguish experimentally between an alcohol and a carboxylic acid?
(i) Litmus Test: Alcohol is a neutral solution and shows no change in litmus paper while carboxylic acid converts blue litmus paper to red.
(ii) Reaction with baking soda: Alcohol does not react with baking soda while carboxylic acid forms brisk effervescence due to the formation of carbon dioxide gas.
(iii) Reaction with alkaline potassium permanganate: On heating, the mixture of alcohol and alkaline potassium permanganate, the pink color of the solution disappears due to the formation of carboxylic acid.
Carboxylic acid will not react with alkaline potassium permanganate.
(iv) Reaction with sodium hydroxide: Alcohol will not react with sodium hydroxide. Carboxylic acid reacts with sodium hydroxide to form a salt of acid along with water.
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