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AIIMS2008ChemistryChemical Bonding and Molecular Structure

Assertion : ( SeCl ₄ ) does not have a tetrahedral structure. Reason : ( Se ) in ( SeCl ₄ ) has two lone pairs.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false.

Step-by-step solution

SeCl ₄ possesses see-saw geometry, which can be regarded as a distorted trigonal bipyramidal structure, having one lone pair of electrons in the basal position of the trigonal bipyramid. See-saw geometry of SeCl ₄ molecules arises due to the s p^3 d hybridisation of the central atom. The distortion in shape is due to the presence of one lone pair of electrons.

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