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2s and 2p- atomic orbitals combine to gi...

2s and 2p- atomic orbitals combine to give how many molecular orbitals ?

A

2

B

4

C

8

D

6

Text Solution

Verified by Experts

The correct Answer is:
C
`2s to (sigma2s) (sigma^(**)2s(2)`
`2p to (sigma2p_(z))(sigma^(**)2p_(z))(pi2p_(x))(pi^(**)2p_(x))(pi2p_(y))(pi^(**)2p_(y))(6)`
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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 bond order?

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?

Which type of atomic orbitals can overlap to from molecular orbitals ?

Molecular orbital (MOT) the atoms in a molecule are supposed to loose their individual control over the electrons . The nuclei of the bonded atoms are considered to be present at equilibrium in inter-nuclear positions . The orbitals where the probability of finding electrons is maximum are multicentred orbitals called molecular orbitals extending over 2 or more nuclei when a pair of atomic orbitals combine and give rise to a pair of molecular MO's in internuclear region but decreased for antibonding MO's . Shielding of the nuclei by-increased electron density in bonding MO's reduces inter nuclear repulsion & thus stabilizes the molecule whereas lower electron density in antibonding MO's increases the repulsion and destabilises the system . Which of the following species have identical value of bond order ?

The conditions for the combination of atomic orbitals to form molecular orbitals are stated below. Mark the incorrect condition mentioned here.

Write the important conditions required for the linear combination of atomic orbitals to form molecular orbitals.

L.C.A.O. Principle is involved in the formation of the molecular orbitals according to molecular orbital theory. The energy of the bonding molecular orbital is less than that of the combining atomic orbitals while that of the antibonding molecular orbitals while that of the order (B.O.)=1/2(N_(b)-N_(a)) helps in predicting formation of molecules/molecular ions, bond dissociation energy, stability and bond length. Only the molecules or ions with positive B.O. can be formed. These will be diamagnetic if all molecular orbitals are dilled and paramagnetic if one of more are half filled. The atomic orbitals at the time of overlap must have the same symmetry as well. In the formation of N_(2)^(+) from N_(2), the electron is removed from a

L.C.A.O. Principle is involved in the formation of the molecular orbitals according to molecular orbital theory. The energy of the bonding molecular orbital is less than that of the combining atomic orbitals while that of the antibonding molecular orbitals while that of the order (B.O.)=1/2(N_(b)-N_(a)) helps in predicting (i) formation of molecules/molecular ions, bond dissociation energy, stability and bond length. Only the molecules or ions with positive B.O. can be formed. These will be diamagnetic if all molecular orbitals are dilled and paramagnetic if one of more are half filled. The atomic orbitals at the time of overlap must have the same symmetry as well. The bond order (B.O.) in B_(2) molecule is:

L.C.A.O. Principle is involved in the formation of the molecular orbitals according to molecular orbital theory. The energy of the bonding molecular orbital is less than that of the combining atomic orbitals while that of the antibonding molecular orbitals while that of the order (B.O.)=1/2(N_(b)-N_(a)) helps in predicting (i) formation of molecules/molecular ions, bond dissociation energy, stability and bond length. Only the molecules or ions with positive B.O. can be formed. These will be diamagnetic if all molecular orbitals are dilled and paramagnetic if one of more are half filled. The atomic orbitals at the time of overlap must have the same symmetry as well. In the homonuclear molecule which of the following sets of M.O. orbitals are degenerate ?

Molecular axis is Z axis , then which of the following combination of orbitals will result in formation of sigma molecular orbitals ?

NCERT FINGERTIPS ENGLISH-CHEMICAL BONDING & MOLECULAR STRUCTURE-Assertion And Reason
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  2. Assertion : In the formation of a molecule , only the outer shell ele...

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  3. Assertion : In the formation of water molecule, both hydrogen and oxyg...

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  4. Assertion : In Liwis structures of NF(3) and CO(3)^(2-), nitrogen and...

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  5. Assertion : PF(5),SF(6)and H(2)SO(4) are the examples of expanded octe...

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  6. Assertion : Octet rule is based upon the chemical inertness of noble g...

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  7. Assertion : Sodium chloride (NaCl) is a stable ionic solid. Reason ...

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  8. Assertion : F(2)and O(2)^(2-)have bond order 1 while N(2),CO and NO^(+...

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  9. Assertion : The experimentally determined carbon to oxygen bond length...

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  10. Assertion : The dipole moment in case of BeF(2) is zero. Reason : T...

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  11. Assertion : Dipole moment of NH(3) is greater than that of NF(3). Re...

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  12. Assertion : Among alkaline earth metals, Be predominantly forms covale...

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  13. Assertion : In NH(3), N "is " sp^(3) hybridised but bond angle is 107^...

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

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  15. Assertion : O(2) molecule is diamagnetic while C(2) molecule is parama...

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  16. Assertion : Boiling point of p-nitrophenol is greater than that of o-n...

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