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NEETChemistryHaloalkanes and Haloarenes

Why do para-isomers have higher melting points compared to ortho- and meta-isomers?

Options

  1. AThey have greater polarity.
  2. BThey have lower molecular mass.
  3. CThey are less symmetric.
  4. DThey fit better in a crystal lattice due to symmetry.

Correct answer

D. They fit better in a crystal lattice due to symmetry.

Step-by-step solution

The higher melting points of para-isomers are due to their symmetry, which allows them to fit better in a crystal lattice.

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