has one σ bond and one π bond.

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The species $C_{2}$

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Important Questions on Chemical Bonding

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

In the molecular orbital diagram for the molecular ion

N_{2}^{+}

, the number of electrons in the

σ_{2 p}

molecular orbital is

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Which of the following options represents the correct bond order?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Consider the following species:

(i)

O_{2}^{2 -}

(ii)

C O^{+}

(iii)

O_{2}^{+}

Among the following, sigma bond alone is present in -

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

The diamagnetic species is:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Which of the following species is not paramagnetic?

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Which one of the following molecules is paramagnetic?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Two pi and half sigma bonds are present in:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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.

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Stability of the species

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

increases in the order of

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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>Molecular Orbital Theory

Which of the following is paramagnetic?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Which of the following has unpaired electron(s)?

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

The correct bond order in the following species is:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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>Molecular Orbital Theory

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

The species C2

Important Questions on Chemical Bonding

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The species $C_{2}$