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How many species have unpaired electrons?

$O_{2}, O_{2}^{-}, O_{2}^{2 -}, {CN}^{-}$

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Important Questions on Chemical Bonding

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Which of the following is paramagnetic?

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:

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 -

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?

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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?

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

The diamagnetic species is:

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

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

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Stability of the species

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

increases in the order of

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

According to Molecular Orbital Theory,

MEDIUM

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

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

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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

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>Molecular Orbital Theory

Which one of the following molecules is paramagnetic?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

The colour of the

X_{2}

molecules of group 17 elements changes gradually from yellow to violet down the group. This is due to -

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Assuming

2 s - 2 p

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

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Which of the following species is not paramagnetic?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

The correct bond order in the following species is:

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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Two pi and half sigma bonds are present in:

How many species have unpaired electrons? O2, O2-, O22-, CN-

Important Questions on Chemical Bonding

Learn and Prepare for any exam you want !

How many species have unpaired electrons?

$O_{2}, O_{2}^{-}, O_{2}^{2 -}, {CN}^{-}$