Question

Class X Sciences
[papers from previous years]

(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.

Answer 1

(a)  
 C₂H₄ +   H₂O   -->  C₂H₅OH  [in presence of Ni catalyst]
  Ethene   Water        Ethanol

(b)
C₂H₅OH --> CH₃COOH             [oxidation with alkaline potassium permanganate    Ethanol      Ethanoic acid          in present  of heat]

(c)
esterification
  CH₃COOH       + CH₃OH --> H₂O + CH₃-CO-OCH₃
Ethanoic acid       ethanol                methyl ethanoate