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KVPY2016Chemistryp Block Elements (Group 15, 16, 17 & 18)

The major products obtained in the reaction of oxalic acid with conc. H ₂ SO ₄ upon heating are

Options

  1. ACO ₂ CO ₂, H ₂ O
  2. BCO , SO ₂, H ₂ O
  3. CH ₂ ~S , CO , H ₂ O
  4. DHCOOH , H ₂ ~S , CO

Correct answer

A. CO ₂ CO ₂, H ₂ O

Step-by-step solution

Conc. sulphuric acid is a strong dehydrating agent. Upon reaction with oxalic acid at elevated temperature, it removes water, carbon monoxide and carbon dioxide as ( hydrated HOOC - oxalic COOH . acid 2 H ₂ O + hot, conc. H ₂ SO ₄ water 3 H ₂ O + carbon monoxide CO + carbon dioxide CO ₂ )

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