Chemistry - Coordination Chemistry Question with Solution | TestHub

Ruby is $\mathrm{A}{\mathrm{l}}_2{\mathrm{O}}_3$ in which Red colour is obtained when $\mathrm{C}{\mathrm{r}}^{+3}$ is replacing $\mathrm{A}{\mathrm{l}}^{+3}$ ions in octahedral sites. Emerald is $\mathrm{B}{\mathrm{e}}_3\mathrm{A}{\mathrm{l}}_2{\left(\mathrm{S}\mathrm{i}{\mathrm{O}}_3\right)}_6$ in which green colour is obtained when $\mathrm{C}{\mathrm{r}}^{+3}$ is replacing $\mathrm{A}{\mathrm{l}}^{+3}$ in octahedral site.