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NEET2013ChemistryChemical Bonding and Molecular StructureActual

Which of the following is a polar molecule?

Options

  1. ABF ₃
  2. BSF ₄
  3. CSiF ₄
  4. DXeF ₄

Correct answer

B. SF ₄

Step-by-step solution

Symmetrical molecules are generally non-polar although they have polar bonds. This is because bond dipole of one bond is cancelled by that of the other. BF ₃, SiF ₄ and XeF ₄ being symmetrical as non-polar. SF ₄ is unsymmetrical because of the presence of a lone pair of electrons. Due to which it is a polar molecule.

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