EASY

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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.

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Important Questions on Chemical Bonding and Molecular Structure

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

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

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

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>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 -

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>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 and Molecular Structure>Molecular Orbital Theory

Two pi and half sigma bonds are present in:

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

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

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

The diamagnetic species is:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

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

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

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

Which of the following options represents the correct bond order?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

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

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

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

Which of the following has unpaired electron(s)?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

Which of the following is paramagnetic?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

Which one of the following molecules is paramagnetic?

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

Among the following molecules/ ions,

$C_{2}^{2 -}, N_{2}^{2 -}, O_{2}^{2 -}, O_{2}$

Which one is diamagnetic and has the shortest bond length?

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>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 and Molecular Structure>Molecular Orbital Theory

Which of the following species is not paramagnetic?

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

The correct bond order in the following species is:

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Molecular Orbital Theory

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

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 ψA+ψB , which shows destructive interference of the combining electron waves.

Important Questions on Chemical Bonding and Molecular Structure

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