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Q. No.Given
\(\mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^0=-0.74 \mathrm{~V} ; \mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^0=1.51 \mathrm{V}\\{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^0=1.33 \mathrm{~V} ; \mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{-}}^0=1.36 \mathrm{~V}\)
Based on the data given above, strongest oxidizing agent will be -
1. Mn2+
2.
3. Cl–
4. Cr3+
Subtopic: Oxidizing & Reducing Agents |
81%
Level 1: 80%+
JEE
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Among the following, how many metal ions act as oxidising agents?
\(\mathrm{Sn}^{2+}, \mathrm{Sn}^{4+}, \mathrm{Pb}^{4+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{+}, \mathrm{Tl}^{3+}\)
1. 2
2. 4
3. 1
4. 0
\(\mathrm{Sn}^{2+}, \mathrm{Sn}^{4+}, \mathrm{Pb}^{4+}, \mathrm{Pb}^{2+}, \mathrm{Tl}^{+}, \mathrm{Tl}^{3+}\)
1. 2
2. 4
3. 1
4. 0
Subtopic: Oxidizing & Reducing Agents |
62%
Level 2: 60%+
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Which of the following cannot as an oxidising agent?
1. \(\mathrm{MnO}_4^{-}\)
2. \(\mathrm{SO}_4^{2-}\)
3. \(\mathrm{N}^{3-}\)
4. \(\mathrm{BrO}_3^{-}\)
1. \(\mathrm{MnO}_4^{-}\)
2. \(\mathrm{SO}_4^{2-}\)
3. \(\mathrm{N}^{3-}\)
4. \(\mathrm{BrO}_3^{-}\)
Subtopic: Oxidizing & Reducing Agents |
82%
Level 1: 80%+
JEE
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Hints
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Consider the given standard electrode potentials:
\(\mathrm{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^0=1.33 \mathrm{~V}\) \(\mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{(-)}}^0=1.36 \mathrm{~V}\)
\(\mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^0=1.51 \mathrm{~V}\) \(\mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^0=-0.74 \mathrm{~V}\)
The strongest reducing agent is:
\(\mathrm{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^0=1.33 \mathrm{~V}\) \(\mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{(-)}}^0=1.36 \mathrm{~V}\)
\(\mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^0=1.51 \mathrm{~V}\) \(\mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^0=-0.74 \mathrm{~V}\)
The strongest reducing agent is:
| 1. | \(\mathrm{Mn}^{2+}\) | 2. | Cr |
| 3. | \(\mathrm{MnO}_4^{-}\) | 4. | \(\mathrm{Cl}^{-}\) |
Subtopic: Oxidizing & Reducing Agents |
69%
Level 2: 60%+
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