Chemistry - Complete d-block Question with Solution | TestHub

Metal ions having variable oxidation number can form more than one types of binary compound. Fe shows $+2,+3$ oxidation states. Thus, it can form ${\mathrm{FeCl}}_3,{\mathrm{FeCl}}_2$. Related Theory Binary compounds are chemical compounds comprising of two distinct elements. For example, water, calcium chloride etc. Caution $\mathrm{Zn}$, even being a transition metal shows only +2 oxidation state, due to fully filled $3d$ subshell.