EASY

Earn 100

Given below are two statements :
Statement (I) : A $π$ bonding $MO$ has lower electron density above and below the inter-nuclear axis.

Statement (II) : The $π^{*}$ antibonding $MO$ has a node between the nuclei.

In light of the above statements, choose the most appropriate answer from the options given below:

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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)

Stability of the species

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

increases in the order of

EASY

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

In the molecular orbital diagram for the molecular ion

N_{2}^{+}

, the number of electrons in the

σ_{2 p}

molecular orbital 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)

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

{Li}_{2}^{+}

and

{Li}_{2}^{-}

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)

The diamagnetic species is:

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?

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)

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.

MEDIUM

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

The correct bond order in the following species is:

EASY

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

Which of the following is paramagnetic?

MEDIUM

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

Two pi and half sigma bonds are present in:

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?

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:

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)

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)

Which of the following has unpaired electron(s)?

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)

Consider the following species,

{CN}^{+}, {CN}^{- 1}, NO and CN

Which one of these will have the highest bond order?

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?

Important Questions on Chemical Bonding and Molecular Structure

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