Question

Shristi heated Ethanol with a compound A in presence of a few drops of concentrated sulphuric acid and observed a sweet smelling compound B is formed. When B is treated with sodium hydroxide it gives back Ethanol and a compound C.

1. Identify A and C
2. Give one use each of compounds A and B.
3. Write the chemical reactions involved and name the reactions.

Answer 1

1. A - Ethanoic acid/ Or any other carboxylic acid,
   C - Sodium salt of ethanoic acid/any other carboxylic acid/sodium ethanoate.
2. Use of A - dil solution used as vinegar in cooking/preservative in pickles.
   Use of B - making perfumes, flavoring agent.
3. \[\ce{CH3COOH + C2H5OH ->[Conc H2SO4] CH3COOC2H5 + H2O}\]
   \[\ce{CH3COOC2H5 + NaOH -> CH3COONa + C2H5OH}\]