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Why is alpha-bond stronger than pi-bond ...

Why is `alpha`-bond stronger than `pi`-bond ?

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Which of the following statements are correct? 1. A sigma bond is stronger than a pi bond 2. A covalent bond is stronger than a hydrrogen bond 3. HF is more polar than HCl 4. There is one electrovalent bond and three covalent bonds in methylene chloride Select the correct answer using the codes given below

Assertion : Si-Si bond is stronger than Si-O bond. Reason: Silicon form Si-Si bond easily.

Sigma bond is stronger than the pi bond. Explain.

A : Atomic size of F is smaller than that of Cl . R : F- F bond is stronger than Cl-Cl bond .

DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE -COVALENT AND CO-ORDINATE BONDS
  1. Define covalent bond according to orbital concept.

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  2. Enilist the favourable conditions for orbital overlap.

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  3. Why is alpha-bond stronger than pi-bond ?

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  4. Difine electronegativily.

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  5. Has electroegativity of of an element specific units ?

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  6. HF is polar while F(2) is non-polar. Explain.

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  7. How many sigma bonds and pi bonds are present in a benzene molecules ?...

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  8. Which out of the following molecules have covalent bonds (i)CaCl(2)(...

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  9. What are SI units of dipole moment?

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  10. Which type of elements take part in the bond formation ?

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  11. Why do covalent molecules have definite geometries ?

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

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

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

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

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

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

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

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

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

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