MCQ
Which of the following complexes show linkage isomerism?
- A[Co(NH3)5(NO2)]2+
- B[Co(H2O)5CO]3+
- C[Cr(NH3)5SCN]2+
- D[Fe(en)2Cl2]+
Explanation:
NO2 and SCN are ambidentate ligands hence, show linkage isomerism.
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$2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{O}_{2}+4 \mathrm{H}^{\oplus}+4 \mathrm{e}^{-} ; \mathrm{E}_{\mathrm{red}}^{0}=1.23 \mathrm{V}$
$(\mathrm{R}=8.314 \;\mathrm{J} \mathrm{mol}^{-1} \mathrm{K}^{-1} ; \text { Temperature }=298 \;\mathrm{K} ;$ oxygen under std. atm. pressure of $1 \;bar$)
$(i)\, [Cr(NO_3)_3 (NH_3)_3]$ $(ii)\, K_3[Co(C_2O_4)_3]$
$(iii)\, K_3[CoCl_2(C_2O_4)_2]$ $(iv)\, [CoBrCl(en)_2]$
Compound $\to$ Oxidation state
$R =0.083\, L$ bar $K ^{-1} \,mol ^{-1}$ ) (Nearest integer)