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The energy of sigma(2s), is greater than...

The energy of `sigma_(2s)`, is greater than that of `sigma_(1s)^**` orbital because

A

`sigma_(2s)` orbital is bigger than `sigma_(1s)` orbital

B

`sigma_(2s)` orbital is a bonding orbital whereas 6 is an antibonding orbital

C

`sigma_(2s)` orbital has a greater value of n than `sigma_(1s)^**` orbital

D

`sigma_(2s)`-orbital is formed only after `sigma_(1s)^**` orbital is formed

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The correct Answer is:
C
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Comprehension given below is followed by some multiple choice question, Each question has one correct options. Choose the correct option. Molecular orbitals are formed by the overlap of atomic orbitals. Two atomic orbitals combine to form two molecular orbitals called bonding molecular orbital (BMO) and anti-bonding molecular orbital (ABMO). Energy of anti-bonding orbital is raised above the parent atomic orbitals that have combined and hte energy of the bonding orbital is lowered than the parent atomic orbitals. energies of various molecular orbitals for elements hydrogen to nitrogen increase in the order sigma1s lt sigma^(star)1s lt sigma^(star)2s lt ((pi2p_(x))=(pi2p_(y))) lt sigma2p_(z) lt (pi^(star)2p_(x) = pi^(star)2p_(y)) lt sigma^(star)2p_(z) and For oxygen and fluorine order of enregy of molecules orbitals is given below. sigma1s lt sigma^(star)1s lt sigma2s lt sigma^(star)2s lt sigmap_(z) lt (pi2p_(x) ~~ pi2p_(y)) lt (pi^(star)2p_(x)~~ pi^(star)2py) lt sigma^(star)2p_(z) Different atomic orbitalsof one atom combine with those atoms orbitals of the second atom which have comparable energies and proper orientation. Further, if the overlapping is head on, the molecular orbital is called sigma, sigma andif the overlap is lateral, the molecular orbital is called pi, pi . The molecular orbitals are filled with electrons according to the same rules as followed for filling of atomic orbitals. However, the order for filling is not the same for all molecules or their ions. Bond order is one of the most important parameters to compare the strength of bonds. 67) Which of the following pair is expected to have the same bonod order?

DINESH PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-Brain Teaser-1
  1. Born-Haber cycle is used to determine

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  2. Which of the following gaseous molecules is polar ?

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  3. The incorrect order of decreasing boiling point is

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  4. Which of the following statements is not regarding bonding molecular o...

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  5. In the formation of N2^+ from N2, the electron is removed from

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  6. The magnitude of lattice energy of a solid increases if

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  7. The electronegativities of F, Cl, Br, and I are 4.0, 3.0, 2.8, and 2.5...

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  8. In which of the following pairs does the first compound not have a hig...

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  9. Which of the following compounds has the least tendency to form hydro...

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  10. In which of the following set of molecules is the order of boiling poi...

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  11. Which of the following statement is correct?

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  12. Which among the following molecules is diamagnetic ?

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

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  14. A wedding ring presented to a bride contains 788 mg of gold and the re...

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  15. The bond that stabilizes the secondary structure of proteins is

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  16. Which of the following does not contain a coordinate bond?

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  17. Hybridisation of central atom in IC l2^+ is

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  18. The transition of an electron from a 4s orbital to ls orbital in hydro...

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  19. The chemical species having same number of electrons in the outermost...

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  20. From among the following triatomic species the least angle around the ...

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