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Which of the follwing combinations are n...

Which of the follwing combinations are not permisible ?
(i) 2pz and 2pz (ii) 2s and 2py (iii) 1s and 2s (iv) 2px and 2px

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The correct Answer is:
(ii) and (iii)
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Name the element with the following electrons configuartions (i) 1s^2 2s^2 2p^6 3s^2 3p^1 (ii ) 1s^2 2s^2 2p^6 3s^2 3p^2 (iii) 1s^2 ""2s^2 ""2p^6 3s^2 3p ^6 3d ^5 4s^1

Identify the atoms that have the following ground state electronic configurations : (i) 1s^2 2s^2 2p^6 3s^2 (ii) 1s^2 2s^2 2p^5 (iii) 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^10 .

DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE -PROMBEMS FOR PRACTICE
  1. Can a sigma bond be formed in the absence of pi bond ?

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  2. Can orbitals present in the 2p sub-sheel hybridise alone ?

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  3. What types of hybridisation are associated with central atom when the ...

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  4. Write the state of hybridisation of boron in BF(3^.)

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  5. How many sigma and pi bonds are present in the molecule of ethene ?

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  6. Mention the state of hybridisation of all the carbon atoms in he molec...

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  7. Assuming z-axis to be intermolecular axis, designate the molecule orbi...

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  8. Which of the follwing combinations are not permisible ? (i) 2pz and ...

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  9. Which combination will lead to pi-molecular orbitals ? (i) 2px-2px (...

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  10. Can 1s and 2s atomic orbitals from molecular orbitals

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  11. In the molecular orbital configuration of N(2) which orbital has lower...

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  12. What is the bond order of H(2)^(-) ion ?

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  13. Arrenge O(2),O(2)^(-),O(2)^(2-),O(2)^(+) in increasing order of bond e...

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  14. What will happen to the bond order if the electron is added ot bonding...

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  15. Why does a molecule of Ne(2) fail to exist ?

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  16. Predict the stability of a molecule if N(a) gtN(b).

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  17. What type of magnetic behaviour is shown by a molecule containing unpa...

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  18. Name a molecule for which bond order is 3.

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  19. Out of O(2) and O(2)^(-) ion which has smaller bond order ?

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  20. Do H(2)^(+) and H(2)^(-) ions have same or different bond orders ?

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