Question

Which of the following has tendency to act as an oxidising agent?

• A. Ce${}^{4+}$
• B. Sm${}^{2+}$
• C. Lu${}^{3+}$
• D. Gd${}^{3+}$

Answer 1

The correct option is A Ce${}^{4+}$

Ce${}^{4+}$ has a tendency to act as an oxidizing agent as it is most stable in the +3 oxidation state. Ce${}^{4+}$ readily gains an electron to form Ce${}^{3+}$. Thus, cerium is reduced and it oxidises another element. $C{e}^{4+}$, thus, acts as an oxidising agent.