Question

Match List 1 (complexes) with List 2 (properties).

Answer 1

A) In the complex $\left[Cr\right(H_{2}O{)}_3\left(N{O}_2{)}_3\right]$, the Cr atom is $d^{2}s{p}^3$ hybridized and contains unpaired electrons. Hence, it is paramagnetic. The complex shows geometrical isomerism (facial and meridional isomers) and linkage isomerism (as nitro group is ambidentate ligand).
B) In the complex $\left[Ni\right(H_{2}O{)}_{2}C{l}_2\left(en\right)]$, the Ni atom undergoes $s{p}^3{d}^2$ hybridization and contains unpaired electrons. Hence, the complex is paramagnetic. It shows geometrical isomerism (cis and trans isomers).
C) In the complex $\left[Co\right(en{)}_2\left(N{O}_2\right)py]$, the Co atom undergoes $d^{2}s{p}^3$ hybridization and shows geometrical isomerism (cis and trans isomers) and linkage isomerism (as nitro group is ambidentate ligand).
D) In the complex $\left[Fe\right(N{H}_3{)}_6]C{l}_2$, the Fe atom undergoes $d^{2}s{p}^3$ hybridization. The pairing of electrons takes place in Fe(II) to make inner field complex.