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Discuss how the valence bond theory expl...

Discuss how the valence bond theory explains the pyramidal shape of `NH_(3)` molecule.

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ICSE-CHEMICAL BONDING AND MOLECULAR STRUCTURE-SHORT ANSWER TYPE QUESTIONS
  1. On the basis of VSEPR theory explain why BeCl2 molecule is linear wher...

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

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

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

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

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

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

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

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

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

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

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

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  13. Explain the formation of C2 H2 molecule.

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  14. Explain why the compounds of the type C2 H2 X2 exhibit cis-trans isome...

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  15. Why does a covalent bond develop a partial ionic character when the el...

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  16. How do the metals conduct heat and electricity?

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  17. Explain why : metals are malleable and ductile,

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  18. Explain why : sodium can be cut with a knife,

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  19. Why is H(2)O a liquid and H(2)S a gas ?

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  20. Explain why : o-nitrophenol possesses low boiling point in spite of...

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