Assertion: [Ni(CN)4]2- is diamagnetic complex.
Reason: [Ni(CN)4]2- involves dsp2 hybridisation and there is no unpaired electron.
Answer & explanation
Correct answer: option 1
In [Ni(CN)4]2-
x + 4(-1) = -2
x - 4 = -2
x = -2 + 4 = 2
28Ni : [Ar]4s23d8
Ni2+ : [Ar]3d8
[Ni(CN)4]2- is diamagnetic complex. It involves dsp2 hybridisation and there is no unpaired electron.