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Why abmo is at high energy level than bmo?

Important Questions on Chemical Bonding

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 ψA+ψB , which shows destructive interference of the combining electron waves.
HARD
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory

Decreasing order of stability of O2, O2-, O2+ and O22- is:

MEDIUM
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
The correct bond order in the following species is:
EASY
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
Which of the following is paramagnetic?
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:
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?
MEDIUM
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
Which one of the following molecules is paramagnetic?
HARD
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
Among the species given below, the total number of diamagnetic species is ___.

H atom, NO2 monomer, O2- (superoxide), dimeric sulphur in vapour phase, Mn3O4, NH42[FeCl4], NH42[NiCl4], K2MnO4, K2CrO4
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
Which one of the following pairs of species has the same bond order?
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 ?
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
Which of the following has unpaired electron(s)?
HARD
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
Assuming 2s – 2p mixing is NOT operative, the paramagnetic species among the following is
MEDIUM
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
According to molecular orbital theory, which of the following molecule will not be available?
EASY
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
Which one of the following molecules is expected to exhibit paramagnetic behaviour?
MEDIUM
Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
Two pi and half sigma bonds are present in:
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Chemistry>Inorganic Chemistry>Chemical Bonding>Molecular Orbital Theory
According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2- ?