Question

Using the data given below, the strongest reducing agent is: $E_{\text{Cr}_2\text{O}_7^{2-}/\text{Cr}^{3+}}^\circ = 33\text{ V}$, $E_{\text{Cl}_2/\text{Cl}^-}^\circ = 36\text{ V}$, $E_{\text{MnO}_4^-/\text{Mn}^{2+}}^\circ = 51\text{ V}$, $E_{\text{Cr}^{3+}/\text{Cr}}^\circ = -74\text{ V}$}

• A. $\text{Cr}$
• B. $\text{Mn}^{2+}$
• C. $\text{Cl}^-$
• D. $\text{Cr}^{3+}$

Hint:

To find the strongest reducing agent quickly, look for the most negative or lowest value in the standard reduction potential data list. The conjugate neutral metal atom or lower-valence ion matching that lowest value ($\text{Cr}$ at $-0.74\text{ V}$) is your answer.

Answer 1

The Correct Option is A