Molecular Orbital Theory

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Molecular Orbital Theory: Overview

This Topic covers sub-topics such as Molecular Orbital Theory, Linear Combination of Atomic Orbitals, Salient features of Molecular Orbital Theory, Energy of Atomic Orbitals and, Energy Level Diagram of Molecular Orbitals

Important Questions on Molecular Orbital Theory

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The following pairs of compounds can be distinguished by which of the following tests:

 (i) Ethylamine and aniline

(ii) Aniline and N-methylaniline

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The number and type of bonds between two carbon atoms in calcium carbide are

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Which of the following has the minimum bond length?

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Which of the following species has four lone pairs of electrons?

                                                                                                                                                                                                                               

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The bond order in   NO is 2.5 while that in   NO +  is 3. Which statement is true for these two species:

 

 

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Among the following, shortest bond length is found in

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Arrange the following molecular species in decreasing order of stability.

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Through the molecular orbital energy diagram of hydrogen molecule, bond order will be-

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Over lapping of 2p orbitals of two atoms forms how many molecular orbitals between two atoms?

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Which of the following are the molecular orbitals formed from the overlapping of 1s atomic orbitals?

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The energy level of an orbit is determined by the _____ value of that particular orbit.

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Assertion. Molecular nitrogen is less reactive than molecular oxygen.

Reason. The bond length of N2 is shorter than that of oxygen

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Assertion : H2 molecule is more stable than HeH molecule.

Reason : The anti bonding electron in the molecule destabilises it.

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The bond formed in between boron atoms based on molecular orbital theory is 

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The number of anti-bonding electrons in the beryllium molecule is

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Shape of px-orbital and s-orbital is _____ respectively.

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Atomic number of Cr, Fe and Co are 24, 26 and 27 respectively. Which of the following inner orbital octahedral complexes are paramagnetic?

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Arrange the following species in the correct order of their stabilities.

N2-,C2,Ne2,O22-

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In which of the following ionization processes the bond energy increases and the magnetic behaviour changes from paramagnetic to diamagnetic?

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Addition an electron to an Antibonding molecular orbital _____