$A.$ $\left[ Fe ( CN )_6\right]^{3-}$;$B.$ $\left[ FeF _6\right]^{3-}$; $C.$ $\left[ CoF _6\right]^{3-}$; $D.$ $\left[ Cr (\text { oxalate })_3\right]^{3-}$; $E.$ $\left[ Ni ( CO )_4\right]$
નીચે આપેલા વિકલ્પોમાંથી સાચો જવાબ પસંદ કરો.
\(B\). \(\left[ FeF _6\right]^{3-} n =5\)
\(C\). \(\left[ CoF _6\right]^{3-} n =4\)
\(D\). \(\left.[\text { Cr(oxalate })_3\right]^{3-} n =3\)
\(E\). \(\left[ Ni ( CO )_4\right] n =0\)
(en $=$ ઇથેન $-1,2-$ ડાય એમ્માઇન , $ox =$ ઓક્ઝેલેટ)
$(I)\, [CrCl_2(NO_2)_2(NH_3)_2]^-$ $(II)\, [Co(NO_2)_3(NH_3)_3]$
$(III)\, [PtCl(NO_2)(NH_3 )(py)]$ $(IV)\, [PtBrCl(en)]$
$(I)\,\,\,-\,\,\,(II)\,\,\,-\,\,\,(III)\,\,\,-\,\,\,(IV)$