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KCET2017ChemistryClassification of Elements and Periodicity in Properties

For the preparation of alkanes, aqueous solution of sodium or potassium salt of carboxylic acid is subjected to

Options

  1. AHydrolysis
  2. BOxidation
  3. CHydrogenation
  4. DElectrolysis

Correct answer

D. Electrolysis

Step-by-step solution

This is Kolbe's electrolytic method which produces alkanes 2 RCOON a+2 H ₂ O Electrolysis 2 R - R +2 ~N aOH + H ₂+ CO ₂ Steps of reaction: 2 CH ₃ COON a Ionization 2 CH ₃ COO ⁻+2 Na ⁺2 H ₂ O Ionization 2 OH ⁻+2 H ⁺ At anode: 2 CH ₃ COO ⁻-2 e⁻ [2 CH ₃ COO ] CH ₃- CH ₃+2 CO ₂ At cathode: 2 H ⁺+2 e⁻ [2 H ] H ₂

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