Based on the data given below : array ll E_ Cr_2 O_7^ 2- / Cr^ 3+ ^ =1.33 ~V & E_ Cl_2 / Cl^ (-) ^ =1.36 ~V E_ MnO_4^ - / Mn^ 2+ ^ =1.51 ~V & E_ Cr^ 3+ / Cr ^ =-0.74 ~V array the strongest reducing agent is :

JEE Main 202524 JanuaryEvening Shift

JEE Main 2025 · 24 January · Evening Shift · Chemistry · Electrochemistry

Based on the data given below : array ll E_ Cr_2 O_7^ 2- / Cr^ 3+ ^...

Based on the data given below :

\begin{array}{ll}\mathrm{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^{\circ}=1.33 \mathrm{~V} & \mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{(-)}}^{\circ}=1.36 \mathrm{~V} \\ \mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^{\circ}=1.51 \mathrm{~V} & \mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{\circ}=-0.74 \mathrm{~V}\end{array}

the strongest reducing agent is :

A. Cr

\begin{aligned} & \mathrm{E}_{\mathrm{Cr}_2 \mathrm{Of}_4^{\circ} / \mathrm{ca}^8}^0=1.33 \mathrm{~V}_{\mathrm{C}_2 / \mathrm{Cr}}^{\circ}=1.36 \mathrm{~V} \\ & \mathrm{E}_{\mathrm{MnO}_4 / \mathrm{Mm}^2}^{\circ}=1.51 \mathrm{~V} \mathrm{E}_{\mathrm{Cr}^2 / \mathrm{Cr}}^0=-0.74 \mathrm{~V} \end{aligned}

The species which has the most negative value of standard reduction potential will be the strongest reducing agent. Since

\mathrm{Cr}^{3+} / \mathrm{Cr}

has SRP value of

-0.74 \mathrm{~V}, \mathrm{Cr}

is the strongest reducing agent.