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Presence of a lone pair of electrons dis...

Presence of a lone pair of electrons distrots the geometry of a covalent molecule.Explain.

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Hybridisation helps us to understand the geometry of the molecules. This is because hybridised orbitals are directed in space in some preferred directions to have stable arrangement, which determine the geometry. The common hybridisation are sp (linear), sp^(2) (trigonal planar), sp^(3) (tetrahedral), sp^(3)d (trigona bipyramidal), sp^(3)d^(2) (octahedral) and sp^(3)d^(3) (pentagonal bipyramidal). The presence of lone pairs in addition to bond pairs distort the geometry because "lone pair "-" lone pair repulsion"gt" lone pair "-" bond repulsion" gt" bond pair" -"bond pair repulsion" . Give an example of molecule involving sp^(3) hybridisation.

Hybridisation helps us to understand the geometry of the molecules. This is because hybridised orbitals are directed in space in some preferred directions to have stable arrangement, which determine the geometry. The common hybridisation are sp (linear), sp^(2) (trigonal planar), sp^(3) (tetrahedral), sp^(3)d (trigona bipyramidal), sp^(3)d^(2) (octahedral) and sp^(3)d^(3) (pentagonal bipyramidal). The presence of lone pairs in addition to bond pairs distort the geometry because "lone pair "-" lone pair repulsion"gt" lone pair "-" bond repulsion" gt" bond pair" -"bond pair repulsion" . What is the hybridisation and shape of XeF_(4) molecule?

Hybridisation helps us to understand the geometry of the molecules. This is because hybridised orbitals are directed in space in some preferred directions to have stable arrangement, which determine the geometry. The common hybridisation are sp (linear), sp^(2) (trigonal planar), sp^(3) (tetrahedral), sp^(3)d (trigona bipyramidal), sp^(3)d^(2) (octahedral) and sp^(3)d^(3) (pentagonal bipyramidal). The presence of lone pairs in addition to bond pairs distort the geometry because "lone pair "-" lone pair repulsion"gt" lone pair "-" bond repulsion" gt" bond pair" -"bond pair repulsion" . Give an example of a molecule involving sp^(3)d hybridisation of the central atom and two lone pairs.

DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE -COVALENT AND CO-ORDINATE BONDS
  1. Why do covalent molecules have definite geometries ?

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  2. Give the shapes associated with the following molecules (i)AB(3)(ii)...

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  3. Presence of a lone pair of electrons distrots the geometry of a covale...

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  4. Bond angle in NH(3) is more than in H(2)O. Discuss

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  5. Define hybridisation. Explain sp^(2) hybridisation with suitable examp...

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  6. Draw the resonating structures fo CO(2) molecule.

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  7. Arrange H(2)O,NH(3) and CH(4) molecules in decreasing order of bond an...

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  8. How will you differentiate between covalent and coordinate bonds?

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  9. Which of the following has larger bond angle in each pair ? (i)CO(2)...

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  10. Indicate whether the following statement is true or false. Justify you...

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  11. Sodium metal vapprises on heating and the vapours have diatomic molecu...

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  12. Which of the following has maximum bond angle ? H(2)O,NH(3),CO(2),CH...

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  13. Why do covalent molecules have definite geometries ?

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  14. (a) What is depoole moment ? (b) What are the units of dipole moment...

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  15. (a) Explain sigma and pi bonds with suitable examples, (b) A pi bond...

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  16. Define hybridisation. What are the characteristics of hybridisation ?

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  17. Discuss the orital stuctures of the following molecules on the basis o...

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  18. What is the major difference between valence bond molecular orbital th...

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  19. Which types of orbitals stabilise a molecule ?

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  20. What is bond stabilising energy ?

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