Question

three tests to distinguish between alcohol and carboxylic acids

Answer 1

Use NaHCO3.

Use litmus test method.

Lucas test.

Answer 2

Alcohol and Carboxylic acid can be determined by:

1. Reaction with Sodium test

• C2H5OH + Na---> C2H5O-Na+ & H2

• CH3COOH + Na---> CH3COONa + H2

2. Litmus test – Alcohol will have no effect on the litmus paper. Carboxylic acid will change blue litmus paper into red.

3. Reaction with sodium hydrogen carbonate – Alcohol has no reaction with sodium hydrogen carbonate (NaHCO3) but in the case of Carboxylic acid it reacts with NaHCO3 which gives CH3COONa, CO2 and H2O. The reaction is evident as the carbon dioxide will turn the lime water milky.

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