(પરમાણુ ક્રમાંક : $Zn = 30$, $Cr = 24$, $Co = 27$, $Ni = 28$)
\(O. N.\) of \(Co = + 3\)
\(C{o^{3 + }}({d^6})\)
\({[Co{(N{H_3})_6}]^{3 + }}\)
Due to paired \({e^ - }\) it is diamagnetic.
| સૂચિ $- I$ | સૂચિ $- II$ |
| $(A)\,Ni(CN)^{3-}_5$ | $(1)\, sp^3$ |
| $(B)\, CuCl^{3-}_5$ | $(2)\, dsp^2$ |
| $(C)\, AuCl^-_4$ | $(3)\, sp^3d_{z^2}$ |
| $(D) \,ClO^-_4$ | $(4)\, d_{x^2-y^2} sp^3$ |
$A\,\,\,-\,\,\,B\,\,\,-\,\,\,C\,\,\,-\,\,\,D$