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Assertion. Both $π$ ( $2 p_{x}$ ) and $π$ * ( $2 p_{x}$ ) molecular orbitals have one nodal plane each.

Reason. All molecular orbitals formed by sideways overlapping of 2 p orbitals have one nodal plane.

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Important Questions on Chemical Bonding and Molecular Structure

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

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

ψ_{A} + ψ_{B}

, which shows destructive interference of the combining electron waves.

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Decreasing order of stability of $O_{2}, O_{2}^{-}, O_{2}^{+}$ and $O_{2}^{2 -}$ is:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which of the following species is not paramagnetic?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which of the following is paramagnetic?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Stability of the species

{Li}_{2}, {Li}_{2}^{-} and {Li}_{2}^{+}

increases in the order of

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Consider the following species:

(i)

O_{2}^{2 -}

(ii)

C O^{+}

(iii)

O_{2}^{+}

Among the following, sigma bond alone is present in -

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which of the following options represents the correct bond order?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which one of the following molecules is paramagnetic?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

In which of the following pairs of molecules/ions, both the species are not likely to exist?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which one of the following molecules is expected to exhibit paramagnetic behaviour?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which one of the following pairs of species has the same bond order?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Two pi and half sigma bonds are present in:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which one of the following properties is not shown by NO ?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

The diamagnetic species is:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Which of the following has unpaired electron(s)?

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

Assuming

2 s - 2 p

mixing is NOT operative, the paramagnetic species among the following is

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

According to molecular orbital theory, which of the following molecule will not be available?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

The correct bond order in the following species is:

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory (MOT)

According to molecular orbital theory, which of the following is true with respect to

{Li}_{2}^{+}

and

{Li}_{2}^{-}

Assertion. Both π (2px ) and π* (2px) molecular orbitals have one nodal plane each. Reason. All molecular orbitals formed by sideways overlapping of 2 p orbitals have one nodal plane.

Important Questions on Chemical Bonding and Molecular Structure

Learn and Prepare for any exam you want !

Assertion. Both $π$ ( $2 p_{x}$ ) and $π$ * ( $2 p_{x}$ ) molecular orbitals have one nodal plane each.

Reason. All molecular orbitals formed by sideways overlapping of 2 p orbitals have one nodal plane.