HARD
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For diatomic molecules, the correct statement(s) about the molecular orbitals formed by the overlap of two orbitals is(are)
(a) orbital has a total of two nodal planes.
(b) orbital has one node in the -plane containing the molecular axis.
(c) orbital has one node in the plane which is perpendicular to the molecular axis and goes through the center of the molecule
(d) orbital has one node in the -plane containing the molecular axis.

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Important Questions on Chemical Bonding and Molecular Structure
MEDIUM
In which of the following pairs of molecules/ions, both the species are not likely to exist?

HARD
According to Molecular Orbital Theory,

EASY
Stability of the species increases in the order of

MEDIUM
The correct bond order in the following species is:

EASY
In the molecular orbital diagram for the molecular ion , the number of electrons in the molecular orbital is

EASY
After understanding the assertion and reason, choose the correct option.
Assertion: In the bonding molecular orbital (MO) of electron density is increased between the nuclei.
Reason: The bonding MO is , which shows destructive interference of the combining electron waves.

HARD
Decreasing order of stability of and is:

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

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

MEDIUM
Two pi and half sigma bonds are present in:

HARD
Which of the following options represents the correct bond order?

MEDIUM
Which statements are correct for the peroxide ion ?

EASY
Which of the following species is not paramagnetic?

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

EASY
Which of the following is paramagnetic?

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

MEDIUM
Which one of the following molecules is paramagnetic?

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

MEDIUM
Consider the following species,
Which one of these will have the highest bond order?

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

