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In a bonding molecular orbital, the elec...

In a bonding molecular orbital, the electron density is almost zero between the nuclei of the combining atoms.

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After understanding the assertion and reason, choose the correct option. Assertion : In the bonding molecular orbital (MO) of H_(2) , electron density is increased between the nuclei. Reason : The bonding MO is Psi_(A)+Psi_(B) , which shows destructive interference of the combining electron waves.

The distribution of electrons among molecular orbitals is called the electronic configuration of the molecule which provides us the following very important informations about the molecule. (A)Stability of molecule : The molecule is stable if number of bonding moleculer orbital electrons (N_b) is greater than the number of antibonding molecular orbital electrons (N_a) . (B) Bond order : Bond order =1/2(N_b-N_a) A positive bond order means a stable molecule while a negative or zero bond order means an unstable molecule. ( C)Nature of the bond : Bond order 1,2 and 3 corresponds to single , double and triple bonds respectively. (D)Bond length: Bond length decreases as bond order increases. (E)Magnetic nature: Molecular orbitals in a molecule are doubly occupied , the substance is diamagnetic and if one or more molecular orbitals are singly occupied, it is paramagnetic. Which of the following statements is incorrect ?

A bonding molecular orbital is formed when the electron waves of the combining atoms are in phase.

L.C.A.O. principle is involved in the formation of molecular orbitals according to molecular obtital theory. The energy of bonding molecular orbital is less than that of the combining atomic orbitals while that of the anitibonding bonding melecular orbital is more. The B.O. =^(1//2)[N_(b)-N_(a)] Answer the following questions on the basis of the above paragraph : (i) What is bonding molecular orbital ? (ii) Calculate B.O. of He_(2) molecule.

Explain bonding and antibonding molecular orbitals.

MO' s are formed by the overlap of A'O s Two AO's combine to form two MO's called bonding molecular orbital (BMO) and antibonding molecular orbital (ABMO) Differnet AO' s of one atom combine with these AO 's of the second atom which have comparable energies and proper orienation Further, If the overlapping is head on, the MO is called 'pi' The MO's are filled with electrons following the same rules as followed for filling of atomic orbitals However the order of filling is not the same for all molecules or their ions Bond order is one of the most important parameter to compare a number of their characteristics Which of the following has pair is expected to have the same bond order ? .

MO' s are formed by the overlap of A'O s Two AO's combine to form two MO's called bonding molecular orbital (BMO) and antibonding molecular orbital (ABMO) Differnet AO' s of one atom combine with these AO 's of the second atom which have comparable energies and proper orienation Further, If the overlapping is head on, the MO is called 'pi' The MO's are filled with electrons following the same rules as followed for filling of atomic orbitals However the order of filling is not the same for all molecules or their ions Bond order is one of the most important parameter to compare a number of their characteristics In which of the following pair both to MO's are gerade or ungerade ? .

MO' s are formed by the overlap of A'O s Two AO's combine to form two MO's called bonding molecular orbital (BMO) and antibonding molecular orbital (ABMO) Differnet AO' s of one atom combine with these AO 's of the second atom which have comparable energies and proper orienation Further, If the overlapping is head on, the MO is called 'pi' The MO's are filled with electrons following the same rules as followed for filling of atomic orbitals However the order of filling is not the same for all molecules or their ions Bond order is one of the most important parameter to compare a number of their characteristics In which of the following pair both to MO's are gerade or ungerade ? .

According to MOT, two atomic orbitals overlap resulting in the formation of molecular orbital formed. Number of atomic orbitals overlapping together is equal to the molecule orbital formed. The two atomic orbital thus formed by LCAO (linear combination of atomic orbital) in the phase or in the different phase are known as bonding and antibonding molecular orbitals respectively. The energy of bonding molecular orbital is lower than that of the pure atomic orbitals by an amount Delta . This known as the stabilization energy. The enerby of antibonding molecular orbital in increased by Delta' (destabilisation energy). Q. Which of the following statements is not correct regarding bonding molecular orbitals?

What is LCAO method? How does it lead to the concept of bonding and antibonding molecular orbitals? What are the main points of difference between bonding and antibonding molecular orbitals?

ICSE-CHEMICAL BONDING AND MOLECULAR STRUCTURE-TRUE OR FALSE TYPE QUESTIONS
  1. An ionic compound conducts electricity even in the solid state due to ...

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  2. In Cl2 molecule, each Cl atom contains only one lone pair of electrons...

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  3. O2 molecule is paramagnetic in nature.

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  4. Covalent compounds possess very high melting and boiling points.

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  5. lonic reactions are much faster than the molecular reactions.

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  6. The bond length in H2 molecule is 0.174 Å.

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  7. The bond length of C-C bond is greater than that of C=C bond.

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  8. Atoms A and B with Lewis structures : underset(* *)overset(* * )A: and...

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  9. Dipole moment is a scalar quantity and is given by m=q xx r.

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  10. All molecules with polar bonds have dipole moment.

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  11. The repulsive interaction between two lone pairs is less than that bet...

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  12. pi- molecular orbital always contains a nodal plane which divides the ...

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  13. The orbitals of an atom having large difference in energy cannot take ...

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  14. Noble gases are soluble in water due to dipole induced dipole interact...

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  15. The mobile electrons in a metal occupy specified positions in the latt...

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  16. A bonding molecular orbital is formed when the electron waves of the c...

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  17. In a bonding molecular orbital, the electron density is almost zero be...

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  18. The maximum number of electrons that can be accommodated in a molecula...

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  19. H(2)^(+) ion contains one electron in bonding and one in antibonding m...

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  20. For N2 molecule, Nb = 8 and Na = 2.

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