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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

`2sigma s` is bigger than`sigma^(**) 1s MO`

B

`sigma2s` is bonding whereas `sigma^(**) 1s` is an ABMO

C

`sigma2s` orbital has a greater value of n than `sigma^(**)1sMO`

D

`sigma2s` orbital is formed only after `sigma 1s`

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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?

DISHA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE -EXERCISE-2: CONCEPT APPLICATOR
  1. Which of these statements is not true?

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  2. The statement true for N(3)^(-) is

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  3. The dipole moments of diatomic molecules AB and CD are 10.41D and 10.2...

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  4. The electronegaivity difference between N and F is greater than that b...

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  5. The charge/size ratio of a cation determines its polarizing power. Whi...

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  6. The resultant dipole moment (mu) of two compounds NOF and NO(2)F is 1....

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  7. The BCl(3) is a planar molecule whereas NCI(3) is pyramidal because

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  8. The cylindrical shape of alkynes is due to

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  9. The AsF5 molecule is trigonal bipyramidal. The orbitals used by As for...

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  10. The correct order of O - O bond length in O(2)H(2)O(2) and O(3) is

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  11. The number and type of bonds in c(2)^(2-) ion in CaC(2) are

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  12. In which of the following sets, all the given species are isostructura...

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  13. Correct statement about VBT is .

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  14. Which of the following species used both axial set of d-orbitals in hy...

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  15. The relationship between the dissociation energy of N2 and N2^+ is

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  16. Bond order normally gives idea of stability of a molecular species. Al...

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  17. The internuclear distances in 0-0 bonds for O(2)^(+),O(2),O(2)^(-) and...

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  18. In forming (i) N(2) rarrN(2)^(o+) and O(2)rarrO(2)^(o+) the electrons ...

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

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  20. Which statement is correct?

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