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Why covalent bonds are called directiona...

Why covalent bonds are called directional bonds whereas ionic bonds are called non- directional?

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V PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-QUESTION BANK
  1. What is meant by formal charge?

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  2. HCl is a polar compound, Why HCl shows polar nature?

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  3. Why covalent bonds are called directional bonds whereas ionic bonds ar...

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  4. AIF 3' is a high melting solid whereas 'SiF4' is a gas. Explain why??

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  5. Which out of 'CH3 F' and. 'CH3 Cl' has a higher dipole moment and why?

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  6. Oút of 'p-' orbital and sp-hybrid orbital which has greater directiona...

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  7. Which has higher lattice energy: NaCl or MgO'? Why?

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  8. What is percentage of s-character in (i) 'sp^3' (ii) 'sp^2' (iii) sp-h...

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  9. Write resonating structures of 'O3'

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  10. Out of 'H-H' and 'Cl-Cl' bonds, which is expected to have higher bond ...

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  11. Account for the following: i) 'NF3' is pyramidal while 'BF3' is trigo...

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  12. Compare the relative stability of the following species and comment on...

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  13. What is meant by bond order? Calculate the bond order of 'He^(2+)'.

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  14. Draw the molecular structures of (i) XeF2 (ii) XeOF2 and (iii) XeF...

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  15. What is meant by hydrogen bond? What is bond energy of hydrogen bond? ...

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  16. In Lewis notations, the valence electrons are represented by dots. a:...

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  17. Complete the following table. '(##VPUHSSCHEXIC04E02017Q01##)'

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  18. How is molecular orbital different from atomic orbital? Give electroni...

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  19. The dipole moment of BF3 is zero eventhough the B-F bonds are polar, J...

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  20. What are the important conditions for hybridisation?

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