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AP EAMCET201825 Apr 2018Morning ShiftChemistryChemical Bonding and Molecular StructureActual

X and Y are two covalent molecules in which the hybridization of the central atoms is the same, but the shapes are different. What are X and Y ?

Options

  1. AXeF 4 , NH 3
  2. BXeF 2 , PF 5
  3. CBF 3 , H 2 O
  4. DCH 4 , BeCl 2

Correct answer

B. XeF 2 , PF 5

Step-by-step solution

XeF 2   and   PF 5 both have sp 3 d hybridisation. Howerver, their shapes will be different according to the VSEPR theory. Xenon fluoride structure has two covalent bonds between one xenon atom and two fluorine atoms. The xenon atom also holds 3 lone pairs of electrons. It has a linear structure. In Phosphorous pentafluoride, phosphorous atom forms five s p 3 d hybrid orbitals and all the five hybrid orbitals will be used to form bonds with five fluorine atoms. There are no lone pairs. It has a trigonal b

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