Q. No.Consider the given reaction:
\(3 \mathrm{ClO}^{-}(\mathrm{aq}) \longrightarrow \mathrm{ClO}_3^{-}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})\),
This reaction is best classified as:
1. Oxidation reaction
2. Reduction reaction
3. Disproportionation reaction
4. Decomposition reaction
\(3 \mathrm{ClO}^{-}(\mathrm{aq}) \longrightarrow \mathrm{ClO}_3^{-}(\mathrm{aq})+2 \mathrm{Cl}^{-}(\mathrm{aq})\),
This reaction is best classified as:
1. Oxidation reaction
2. Reduction reaction
3. Disproportionation reaction
4. Decomposition reaction
Subtopic: Redox Titration & Type of Redox |
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Which among the following compounds has the highest oxidation number of sulphur ?
1. H2SO4
2. SO3
3. H2S2O7
4. All have the same oxidation number for sulphur
1. H2SO4
2. SO3
3. H2S2O7
4. All have the same oxidation number for sulphur
Subtopic: Redox Titration & Type of Redox |
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What is the change in the oxidation state of Hg in the following reaction?
2HgCl2(aq.) + SnCl2(aq.) → Hg2Cl2(s) + SnCl4(aq.)
1. +2 to 0
2. +2 to +1
3. +1 to +2
4. +4 to +2
2HgCl2(aq.) + SnCl2(aq.) → Hg2Cl2(s) + SnCl4(aq.)
1. +2 to 0
2. +2 to +1
3. +1 to +2
4. +4 to +2
Subtopic: Redox Titration & Type of Redox |
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Level 1: 80%+
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Match the items in Column-I with the items in Column-II.
| Column-I | Column-II | ||
| a. | N2 (g) + O2 (g) → 2 NO (g) | i. | Disproportionation redox reaction |
| b. | 2Pb(NO3)2(s) → 2PbO(s) + 4 NO2 (g) + O2 (g) | ii. | Decomposition redox reaction |
| c. | NaH(s) + H2O(l) → NaOH(aq) +H2 (g) | iii. | Combination redox reactions |
| d. | 2NO2(g) + 2OH–(aq) → NO2–(aq) + NO3– (aq) + H2O(l) | iv. | Displacement redox reaction |
2. a = iii; b = iv; c = i; d = ii
3. a = ii; b = iii; c = iv; d = i
4. a = iv; b = i; c = iii; d = ii
Subtopic: Redox Titration & Type of Redox |
87%
Level 1: 80%+
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Subtopic: Redox Titration & Type of Redox |
87%
Level 1: 80%+
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Which change represents an oxidation?
1. \(\mathrm{NO}_2^{-} \rightarrow \mathrm{N}_2 \)
2. \(\mathrm{VO}^{2+} \rightarrow \mathrm{VO}_3^{-} \)
3. \(\mathrm{ClO}^{-} \rightarrow \mathrm{Cl}^{-} \)
4. \(\mathrm{CrO}_4{ }^{2-} \rightarrow \mathrm{Cr}_2 \mathrm{O}_7{ }^{2-}\)
1. \(\mathrm{NO}_2^{-} \rightarrow \mathrm{N}_2 \)
2. \(\mathrm{VO}^{2+} \rightarrow \mathrm{VO}_3^{-} \)
3. \(\mathrm{ClO}^{-} \rightarrow \mathrm{Cl}^{-} \)
4. \(\mathrm{CrO}_4{ }^{2-} \rightarrow \mathrm{Cr}_2 \mathrm{O}_7{ }^{2-}\)
Subtopic: Redox Titration & Type of Redox |
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Which of the following represents an oxidation half-reaction, for the given redox reaction?
\(3MnO_2 \,+\,2Al\) → \(2Al_2O_3 \,+\,3Mn\),
1. Mn4+ + 4e− → Mn
2. Mn2+ + 2e− → Mn
3. Al → Al3+ + 3e−
4. Al3+ + 3e− → Al
\(3MnO_2 \,+\,2Al\) → \(2Al_2O_3 \,+\,3Mn\),
1. Mn4+ + 4e− → Mn
2. Mn2+ + 2e− → Mn
3. Al → Al3+ + 3e−
4. Al3+ + 3e− → Al
Subtopic: Redox Titration & Type of Redox |
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Consider the reaction:
\(\mathrm {{H}_2 {SO}_3({aq})+{Sn}^{4+}({aq})+{H}_2 {O}({l}) \rightarrow \\ {Sn}^{2+}({aq})+{HSO}_4^{-}({aq})+3 {H}^{+}({aq}) }\)
Which of the following statements is correct?
\(\mathrm {{H}_2 {SO}_3({aq})+{Sn}^{4+}({aq})+{H}_2 {O}({l}) \rightarrow \\ {Sn}^{2+}({aq})+{HSO}_4^{-}({aq})+3 {H}^{+}({aq}) }\)
Which of the following statements is correct?
| 1. | \(\mathrm{Sn}^{4+}\) is the oxidizing agent because it undergoes oxidation. |
| 2. | \(\mathrm{Sn}^{4+}\) is the reducing agent because it undergoes oxidation. |
| 3. | \(\mathrm{H}_2 \mathrm{SO}_3\) is the reducing agent because it undergoes oxidation. |
| 4. | \(\mathrm{H}_2 \mathrm{SO}_3\) is the reducing agent because it undergoes reduction. |
Subtopic: Redox Titration & Type of Redox |
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Level 1: 80%+
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Which of the following statements accurately describes a redox couple?
| 1. | The redox couple consists of two oxidized forms of the same element. |
| 2. | The redox couple consists of two reduced forms of the same element. |
| 3. | Both reduced and oxidized forms are produced from the same element. |
| 4. | All of the above. |
Subtopic: Redox Titration & Type of Redox |
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Level 2: 60%+
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Which of the following is not an oxidation-reduction reaction?
| 1. | H2 + Br2 → 2HBr |
| 2. | NaCl + AgNO3 → NaNO3 + AgCl |
| 3. | 2Na2S2O3 + I2 → Na2S4O6 + 2NaI |
| 4. | Cl2 + H2O → HCl + HOCl |
Subtopic: Redox Titration & Type of Redox |
80%
Level 1: 80%+
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