In , Nickel is in +2 oxidation state. has a electronic configuration.

The complex is given as paramagnetic. For a 4 -coordinate system, paramagnetism implies a tetrahedral geometry ( hybridization) with two unpaired electrons.
Statement A: Tetrahedral complexes of the type do not exhibit geometrical isomerism because all positions are adjacent to each other. Thus, A is incorrect.
Statement B: Most complexes are colored due to transitions. is a dark blue/green crystalline solid, not white. Thus, B is incorrect.
Statement C: With 2 unpaired electrons, the spin-only magnetic moment
. Thus, C is correct.
Statement D: For a tetrahedral complex with configuration, the CFSE is calculated as
. The statement mentions , which is incorrect as the complex is tetrahedral, not octahedral. Thus, D is incorrect.
Statement E: is a tetrahedral complex ( hybridization). Since is also tetrahedral, their geometrical arrangements are similar. Thus, E is correct.

The incorrect statements are A, B, and D.