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Question:

Maleic anhydride

Maleic anhydride can be prepared by :

  1. Heating trans-but-2-enedioic acid

  2. Heating cis-but-2-enedioic acid

  3. Treating cis-but-2-enedioic acid with alcohol and acid

  4. Treating trans-but-2-enedioic acid with alcohol and acid


Correct Option: , 2

Solution:

Cis but 2-enoic acid

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