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JEE Main2018ChemistryChemical Bonding and Molecular StructureActual

Identify the pair in which the geometry of the species is T-shaped and square-pyramidal, respectively,

Options

  1. AICl 2 - and ICl 5 .
  2. BIO 3 - and   IO 2 F 2 - .
  3. CClF 3 and IO 4 - .
  4. DXeOF 2 and XeOF 4 .

Correct answer

D. XeOF 2 and XeOF 4 .

Step-by-step solution

In XeOF 2 , the central atom has 3 bond pairs and 2 lone pairs. Hence, the electrons will enter a trigonal bipyramidal geometry. The 2 lone pairs will take up equatorial positions giving the molecule a T-shape. Xe in XeOF 4 has 5 bond pairs and 1 lone pair. The electrons will take up square bipyramidal geometry, but due to a lone pair, the shape of the molecule will be square pyramidal.

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