- 1(current)
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 |
78%
Level 2: 60%+
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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 |
65%
Level 2: 60%+
JEE
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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 |
78%
Level 2: 60%+
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 |
71%
Level 2: 60%+
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Hints
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Arrange the following compounds according to their decreasing oxidising power:
\(\mathrm{BrO}_4^{-}, \mathrm{IO}_4^{-}, \mathrm{ClO}_4^{-}\)
1. \( \mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}\)
2. \(\mathrm{BrO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{ClO}_4^{-}\)
3. \(\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}\)
4. \( \mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}\)
\(\mathrm{BrO}_4^{-}, \mathrm{IO}_4^{-}, \mathrm{ClO}_4^{-}\)
1. \( \mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}\)
2. \(\mathrm{BrO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{ClO}_4^{-}\)
3. \(\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}\)
4. \( \mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}\)
Subtopic: Oxidizing & Reducing Agents |
Level 4: Below 35%
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Among the following, which is the strongest oxidizing agent?
1. \(Mn^{3+}\)
2. \(Fe^{3+}\)
3. \(Ti^{3+}\)
4. \(Cr^{3+}\)
1. \(Mn^{3+}\)
2. \(Fe^{3+}\)
3. \(Ti^{3+}\)
4. \(Cr^{3+}\)
Subtopic: Oxidizing & Reducing Agents |
72%
Level 2: 60%+
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Identify the process in which a change in the oxidation state is five:
1. \(\mathrm{MnO}_4^{-} \rightarrow \mathrm{Mn}^{2+}\)
2. \(\mathrm{CrO}_4^{2-} \rightarrow \mathrm{Cr}^{3+}\)
3. \(\mathrm{C}_2 \mathrm{O}_4^{2-} \rightarrow 2 \mathrm{CO}_2\)
4. \(\mathrm{Cr}_2 \mathrm{O}_7^{2-} \rightarrow 2 \mathrm{Cr}^{3+}\)
1. \(\mathrm{MnO}_4^{-} \rightarrow \mathrm{Mn}^{2+}\)
2. \(\mathrm{CrO}_4^{2-} \rightarrow \mathrm{Cr}^{3+}\)
3. \(\mathrm{C}_2 \mathrm{O}_4^{2-} \rightarrow 2 \mathrm{CO}_2\)
4. \(\mathrm{Cr}_2 \mathrm{O}_7^{2-} \rightarrow 2 \mathrm{Cr}^{3+}\)
Subtopic: Oxidizing & Reducing Agents |
88%
Level 1: 80%+
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The compound that cannot act as both an oxidizing and reducing agent is:
| 1. | \(H_2O_2\) | 2. | \(HNO_2\) |
| 3. | \(H_2SO_3\) | 4. | \(H_3PO_4\) |
Subtopic: Oxidizing & Reducing Agents |
62%
Level 2: 60%+
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If \(\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7\left(200 \mathrm{~cm}^3, \mathrm{x} \times 10^{-3} \mathrm{M}\right)\) reacts with Mohr's salt \( (0.6 \text M~,750~\text{cm}^3)\) then find the value of x:
1. 125
2. 250
3. 375
4. 750
1. 125
2. 250
3. 375
4. 750
Subtopic: Oxidizing & Reducing Agents | Redox Titration & Type of Redox |
Level 4: Below 35%
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- 1(current)
Q. No.
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