For and are and respectively

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

E∘E^\circ for Cr3++3e−→Cr\text{Cr}^{3+} + 3e^- \rightarrow \text{Cr} and Cr3++e−→Cr2+\text{Cr}^{3+} + e^- \rightarrow \text{Cr}^{2+} are −0.74 V-0.74 \text{ V} and −0.40 V-0.40 \text{ V} respectively. E∘E^\circ for Cr2++2e−→Cr\text{Cr}^{2+} + 2e^- \rightarrow \text{Cr} is : (1) −0.91 V-0.91 \text{ V} (2) +0.91 V+0.91 \text{ V} (3) −1.14 V-1.14 \text{ V} (4) +0.34 V+0.34 \text{ V}

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