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When two AO s combine energy of bonding ...

When two `AO` s combine energy of bonding `MO` is lowered by x while of antibonding `MO` is raised by y Then .

A

`x =y`

B

`x lt y`

C

`x gt y`

D

Can be any of these

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The correct Answer is:
B
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In MO energy diagram for heteronuclear diatomic molecule is similar However, the energies of the AO s of the atom having higher atomic number being lower, the diagram will be unsymmetrical, but that will not make a difference in the electron count The bond order is half the difference in the number of electrns of the bonding (sigma and pi) and anti-bonding (sigma and pi) MO s For a bond to have been formed the bond order the shorter is the bond distance and the greater is the bond dissociation energey But if the bond order is smae in the above two cases, then the bond distance will be greater and the bond dissocation energy smaller in the case which has more populated anti-bonding orbitals The presence of unpaired electron(s) in a molecualr orbital will make the system paramagnetic Which among the following will have a triple bond order ? .

In MO energy diagram for heteronuclear diatomic molecule is similar However, the energies of the AO s of the atom having higher atomic number being lower, the diagram will be unsymmetrical, but that will not make a difference in the electron count The bond order is half the difference in the number of electrns of the bonding (sigma and pi) and anti-bonding (sigma and pi) MO s For a bond to have been formed the bond order the shorter is the bond distance and the greater is the bond dissociation energey But if the bond order is smae in the above two cases, then the bond distance will be greater and the bond dissocation energy smaller in the case which has more populated anti-bonding orbitals The presence of unpaired electron(s) in a molecualr orbital will make the system paramagnetic Which of the following species is not expected to exist ? .

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CENGAGE CHEMISTRY-CHEMICAL BONDING AND MOLECULAR STRUCTURE-Exercises Single Correct (Molecular Orbital Theory (Mot))
  1. The species which does not show paramagnetism is .

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  2. Which of the following cannot exist on the basic of MO theory ? .

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  3. Which one paramagnetic and has a bond order of 0.5 ? .

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  4. The bond energies NO,NO^(o=) and No^(Theta) ion the highest occupied o...

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  5. In the MO diagram for O(2)^(Theta) ion the highest occupied orbital is...

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  6. Which of the following is not diamagnetic ? .

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  7. The bond order of CO and NO is .

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  8. Combination of two AO s lead to the formation of .

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  9. The possible molecular orbital formed when two d-orbitals overlap is .

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  10. Which of the following species exhibits the diamagnetic behaviour ?

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  11. Which of the following species is paramagnetic ? .

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  12. The bond order in NO is 2.5 while that in NO^(o+) is 3 Which of the fo...

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  13. When two AO s combine energy of bonding MO is lowered by x while of an...

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  14. In Which of the following the double bond consistts of the pi bonds .

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  15. Which of the following MOs has more than one nodal plane?

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  16. Which of the following MO's has zero nodal planes ? .

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  17. The main axis of diatomic molecule is z. The orbitals px and py overla...

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  18. The paramagnetic property of the oxygen molecule is due to the presenc...

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  19. Which of the following combination is not allowed in the LCAO method f...

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  20. The energy of sigma(2s), is greater than that of sigma(1s)^** orbital ...

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