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JEE Main levelSingle correct optionDifficulty 2 of 3co185

Propanedioic acid (malonic acid) is heated just above its melting point (about 140 C). The organic product is

  1. Apropanoic acid
  2. Bethanoic acid
  3. Cethanedioic acid
  4. Dmethanoic acid

Answer: B

Malonic acid has a carboxyl group beta to another carbonyl group, so it loses on heating: .
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