The correct statement among the following is:
and 
are diamagnetic and 
is paramagnetic. 
and 
are diamagnetic and 
is paramagnetic. 
and 
are diamagnetic and 
is paramagnetic. 
is diamagnetic and 
and 
are paramagnetic.
Text Solution
Verified by ExpertsA
In 
, Nickel is in 0 oxidation state with configuration 
is a strong field ligand, causing pairing of 
electrons into 
orbitals, resulting in 
configuration. It is 
hybridized and diamagnetic (zero unpaired electrons).
In 
, Nickel is in +2 oxidation state with configuration 
is a strong field ligand, causing pairing of the two unpaired electrons in 
orbitals. It is 
hybridized (square planar) and diamagnetic. In 
, Nickel is in +2 oxidation state with configuration 
is a weak field ligand and cannot cause pairing of electrons. It has two unpaired electrons in 
orbitals, making it 
hybridized (tetrahedral) and paramagnetic.
Therefore, 
and 
are diamagnetic, while 
is paramagnetic.
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