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JIPMER2013ChemistryGeneral Organic Chemistry

Which of the following compounds have highest melting point?

Options

  1. AOnly I
  2. BOnly II
  3. CI and II
  4. DII and III

Correct answer

B. Only II

Step-by-step solution

Compound (II) is most symmetrical because it has both CH ₃ groups and Cl atoms p -to each other. Therefore, it fits in the crystal lattice better than the other two isomers and hence it has highest melting point.

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