Question

Which of the following is a set of reducing agents ?

• A. $HNO_3 , Fe^{2+} , F_2$
• B. $F^{-} , Cl^{-} , MnO^{-}_4$
• C. $I^{-} , Na , Fe^{2+}$
• D. $Cr_2 O_7^{2-} , CrO^{2-}_4 , Na$

Answer 1

Answer: (C)

A species that is in an oxidation state other than its highest possible oxidation state can act as a reducing agent. Therefore, $I^{-} , Na$ and $Fe^{2+}$ all will act as reducing agents.