(a) Write the chemical equation representing the preparation reaction of ethanol from ethene. (b) Name the product obtained when ethanol is oxidised by either chromic anhydride or alkaline potassium permanganate. (c) Give an example of an esterification reaction.



A) Ethene + Water ---Ni Catalyst---> Ethanol
C2H+ H2O ---Ni Catalyst---> C2H5OH

b) Ethanoic acid
Equation : C2H5OH -----Alkaline KMnO4 + heat or Acidified K2Cr2O7-----> CH3-COOH
Remember : Any alcohol, when oxidised with Alkaline KMnO4 + heat or Acidified K2Cr2O7 gives its respective acid.
Example : Methanol gives methanoic acid when oxidised.

c) Butanoic acid + Ethanol ---Conc. H2SO4---> Ethyl Butanoate (ester) + waterC3H7-COOH + C2H5OH ---Conc. H2SO4---> C3H7-COO-C2H5 + H2O
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