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Why are the pi-bonds weaker and more rea...

Why are the `pi`-bonds weaker and more reactive than the `sigma`-bonds?

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The extent of axial overlapping is greater as compared to sideways overlappin hence `pi`bonds are weaker and more reactive than `sigma`-bonds.
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CHHAYA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-WARM UP EXERCISE
  1. Explain why covalent bonds possess directional property.

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  2. What do you meann by a sigma and pi-bond?

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  3. Why are the pi-bonds weaker and more reactive than the sigma-bonds?

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  4. Arrange (s-s), (s-p) and (p-p) sigma-bonds in order of decreasing bond...

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  5. Explain why the formation of a pi-bond is not possible between a p(y) ...

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  6. Which symmetry element is present in a pi-bond?

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  7. What is meant by hybridisation of atomic orbitals?

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  8. What will be the spatial distribution of (i) sp^(3), (ii) sp^(2) a...

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  9. Is hybridisation possible in an isolated atom?

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  10. The state of hybridisation of the central atom of which of the followi...

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  11. Name the type of hybridisation of the central atom which leads to eaac...

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  12. Identify the state of hybridisation of each carbon in: (i) CH(2)=CH-...

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  13. The four C-H bonds in methane are equivalent though carbon was differe...

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  14. Arrange ehthane, ethylene and acetylene in order of their decreasing C...

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  15. Total number of lone pair of electrons in I(3)^(-) ion is -

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  16. Why are the P-Cl bonds in PC l(5) not of same length?

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  17. Which of the molecules or ions are iso-structural and why? BF(3),NH(...

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  18. All the C-O bond lengths in CO(3)^(2-) are equal-explain.

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  19. Give reasons for the extra stability of benzene.

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  20. Write the canonical structures for sulphite ion and phosphate ion.

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