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The most stable oxidized species among the following is:
\(E_{{\mathrm{Cr}_2 \mathrm{O}_7^2}/ \mathrm{Cr}^{3+}}^{o} =1.33 \mathrm{~V} ; E_{\mathrm{Cl}_2 / \mathrm{Cl}^{-}}^{o}=1.36 \mathrm{~V} \)
\( E_{\mathrm{MnO_{4}}^{-} / \mathrm{Mn}^{2+}}^{o}=1.51 \mathrm{~V} ; E_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{o}=-0.74 \mathrm{~V}\)
| 1. | Cr3+ | 2. | MnO4- |
| 3. | Cr2O72- | 4. | Mn2+ |
Subtopic: Electrochemical Series |
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The standard reduction potential of Zn2+/Zn and Cu2+/Cu is -0.76 and +0.34 V respectively. The oxidising agent and reducing agent, respectively, are
| 1. | Cu & Zn2+ | 2. | Zn & Cu |
| 3. | Cu2+ & Zn2+ | 4. | Cu2+ & Zn |
Subtopic: Electrochemical Series |
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Given below are two statements:
| Assertion (A): | Cu is less reactive than hydrogen. |
| Reason (R): | E°Cu2+/ Cu is negative. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Electrochemical Series |
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