Molecular Orbital Theory (MOT)

IMPORTANT

Molecular Orbital Theory (MOT): Overview

This topic highlights the salient features of the molecular orbital theory. It explains formation of molecular orbital linear combination of atomic orbitals. It also discusses the types of molecular orbitals and energy level diagrams of molecular orbitals.

Important Questions on Molecular Orbital Theory (MOT)

EASY
IMPORTANT

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

 

 

EASY
IMPORTANT

Label the molecular orbitals formed by the combination of atomic orbitals 2s+2s.

EASY
IMPORTANT

Explain how p-p orbital overlapping along the internuclear axis.

MEDIUM
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Explain how s-s orbital overlapping along the internuclear axis.

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

EASY
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Write the salient features of molecular orbitals.

EASY
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Write any three differences between molecular orbitals and atomic orbitals.

EASY
IMPORTANT

What will be the bond order of the species with electronic configuration  1s2 2s2 2p5?(one/two/three)

HARD
IMPORTANT

Calculate the bond order and predict the magnetic property of B2 molecule.

HARD
IMPORTANT

The correct bond order in the following species is

MEDIUM
IMPORTANT

Which one of the following species does not exist under normal conditions?

HARD
IMPORTANT

Choose the paramagnetic oxide in the following:

EASY
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Assertion. Bond order can assume any value including zero.

Reason. Higher the bond order, shorter is the bond length and greater is the bond energy.

MEDIUM
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From the following select the molecule that cannot exist.

HARD
IMPORTANT

Consider the following molecules: $\mathrm{O}_{2}, \mathrm{Cl}_{2}, \mathrm{Li}_{2}, \mathrm{H}_{2}, \mathrm{B}_{2}, \mathrm{C}_{2}$ and $\mathrm{N}_{2}$
Let $a=$ number of molecules having (bond order $=1$ ) $\mathrm{b}=\text { number of molecules } \text { having (bond order }=2)$
$\mathrm{c}=$ number of molecules having (bond order $=3$ ) $\mathrm{d}=$ number of paramagnetic molecules. Find the value of $(a \times b \times c \times d \times 4.2)$

HARD
IMPORTANT

Which of the following molecule is paramagnetic in nature?

MEDIUM
IMPORTANT

Which of the following pairs will have same bond order?

EASY
IMPORTANT

What will be the bond order of the diatomic species with the elemental electronic configuration : 1s2 2s2 2p5?