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State and explain Fajan's rules....

State and explain Fajan's rules.

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ICSE-CHEMICAL BONDING AND MOLECULAR STRUCTURE-SHORT ANSWER TYPE QUESTIONS
  1. What do you understand by variable electrovalency? Give atleast two ex...

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  2. What are Sidgwick's views regarding the failure of the octet rule?

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  3. State and explain Fajan's rules.

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  4. Define dipole moment. How is it related to the molecular structure?

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  5. Write the resonating structures of O3 and CO2.

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  6. What is lattice energy and how is it related to the stability of an io...

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  7. Why do covalent compounds exhibit stereoisomerism?

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  8. On the basis of VSEPR theory explain why BeCl2 molecule is linear wher...

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  9. What type of forces come into action when two atoms approach each othe...

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  10. Discuss how the valence bond theory explains the pyramidal shape of NH...

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  11. Give two differences between a sigma bond and a pi bond.""^(**"**)

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  12. Draw the shapes of sp^3 , sp^2 and sp hybrid orbitals.

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  13. Out of σ and π-bonds, which bond is stronger and why?

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  14. Why are the molecules like He2 , H3 and H4 not formed?

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  15. What do you understand by bond length? On what factors does it depend?

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  16. Carbon possesses only two unpaired electrons in its valence shell. How...

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  17. What are the conditions necessary for the formation of covalent molec...

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  18. Why is a molecule involving sp^2 hybridisation trigonal and planar?

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  19. Explain how the valence bond theory accounts for a carbon carbon doubl...

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  20. Explain the formation of C2 H2 molecule.

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