EASY
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Which among the following is diamagnetic or paramagnetic NiCO4, Ni(CN)42- and NiCl 4 2 - ?

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Important Questions on Chemical Bonding and Molecular Structure

EASY
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

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

HARD
In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?
EASY
Which one of the following molecules is expected to exhibit paramagnetic behaviour?
HARD
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
Stability of the species  Li 2 , Li 2 - and Li 2 +  increases in the order of
EASY
Which one of the following pairs of species has the same bond order?
MEDIUM
Which one of the following properties is not shown by NO ?
HARD
Assuming 2s  2p mixing is NOT operative, the paramagnetic species among the following is
MEDIUM
According to molecular orbital theory, which of the following molecule will not be available?
MEDIUM
In which of the following pairs of molecules/ions, both the species are not likely to exist?
EASY
According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2- ?