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What orbitals can overlap to form a sig...

What orbitals can overlap to form a `sigma`-bond and which orbitals can overlap to form a `pi`-bond?

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`s-s,p-p` form `sigma`-bond and only `p-p` form `pi`-bond.
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Molecular orbitals are formed by the overlap of atomic orbitals. The combining orbitals must have proper orientation so that they can overlap to a considerable extent. Two atomic orbitals combine to form two molecular orbitals called bonding molecular orbital and antibonding molecular orbital. Bonding molecular orbital is stable and antibonding molecular orbital is unstable. sigma MO is formed by head on overlap while pi MO is formed by sidewise overlap. The MOs are filled with electrons according to the same rules as followed for filling atomic orbitats. Bond order is one of the most important parameter to compare the bond strength and bond length of bonds. Why has N_2 a larger dissociation energy than N_2 ^(+) whereas O_2 has a lower dissociation energy than O_(2)^(+) ?

CENGAGE CHEMISTRY-APPENDIX - INORGANIC VOLUME 1-Exercise Short
  1. Which of the following molecule/molecules have zero dipole moment? N...

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  2. Differentiate between VB theory and Lewis concept.

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  3. What orbitals can overlap to form a sigma-bond and which orbitals can...

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  4. Write the important conditions required for the linear combination of ...

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  5. Answer the following: a. Which electron takes part in bond formation...

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  6. Out of the following, select the compounds containing ionic, covalent ...

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  7. What are the conditions which must be satisfied for H-bonding to take ...

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  8. What happens to the probability of finding an electron in the MO's aft...

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  9. What are SI units of dipole moment?

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  10. Out of CS(2) and OCS which have higher dipole moment and why?

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  11. How do you express the bond strength in terms of bond order?

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  12. Which of the following statements are correct? 1. A sigma bond is st...

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  13. x. The hybrid state of carbon atoms in C(60) molecule is :

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  14. With what neutral molecule is CIO^(ө) isoelectronic?

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  15. Give the change in bond order in the following ionisation process? i...

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  16. The magnetic moment of KO(2) at room temperature is ---------- BM.

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  17. On the basis of VSEPR theory, predict the shapes of the following mole...

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  18. Why is HCl predominantly covalent in the gaseous state but ionic in th...

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  19. Why molbilities of H^(o+) ions in ice is greater as compared to liquid...

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  20. Ionic bonds are non-directional while covalent bonds are directional.

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