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What is inert pair effect? How does it a...

What is inert pair effect? How does it account for the variable electrovalency of the elements having configuration of the type `ns^2 np^(1-4)`.

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Statement-1 :Helium and beryllium both are chemically inert. Statement-2 : Helium and beryllium have similar outer electronic configuration of the type ns^(2)

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ICSE-CHEMICAL BONDING AND MOLECULAR STRUCTURE-SHORT ANSWER TYPE QUESTIONS
  1. Discuss the factors which govern the formation of an ionic bond.

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  2. What do you understand by variable electrovalency? Give atleast two ex...

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  3. What is inert pair effect? How does it account for the variable electr...

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  4. What is Born-Haber cycle? Explain with an example.

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  5. What are the factors which favour the formation of a covalent bond? Ex...

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  6. What do you understand by variable electrovalency? Give atleast two ex...

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

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  8. State and explain Fajan's rules.

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

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  10. Write the resonating structures of O3 and CO2.

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

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  12. Why do covalent compounds exhibit stereoisomerism?

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

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

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

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

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

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

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

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

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