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Q. No.Given below two statements:
| Assertion (A): | The oxidation state of Cr in CrO5 is +6. |
| Reason (R): | All oxygen atoms have -2 oxidation number. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Introduction to Redox and Oxidation Number |
74%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | HClO4 is a stronger acid than HClO3. |
| Reason (R): | The oxidation state of Cl in HClO4 is +8 and in HClO3 is +5. |
| 1. | Both (A) and (R) are True, and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, and (R) is not the correct explanation of (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Introduction to Redox and Oxidation Number |
78%
Level 2: 60%+
Hints
Given below are two statements:
| Statement I: | In some cases, oxygen shows a positive oxidation number, though it is an electronegative element. |
| Statement II: | Fluorine is more electronegative than oxygen. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Both Statement I and Statement II are false. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: Introduction to Redox and Oxidation Number |
80%
Level 1: 80%+
Hints
Consider the given two statements:
| Assertion (A): |
Fluorine has the ability to oxidize other elements to their highest oxidation states. |
| Reason (R): | The fluoride ion is very difficult to oxidize back to fluorine because of its very small size and very high hydration enthalpy, making the reverse reaction less favorable. |
| 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: Oxidizing & Reducing Agents |
68%
Level 2: 60%+
Hints
| Assertion (A): | Fluorine exists only in -1 oxidation state. |
| Reason (R): | Fluorine has 2s22p5 configuration. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True and (R) is NOT the correct explanation of (A). |
| 3. | (A) is True and (R) is False. |
| 4. | (A) is False and (R) is True. |
Subtopic: Introduction to Redox and Oxidation Number |
53%
Level 3: 35%-60%
Hints
Given below are two statements:
| Statement I: | l2 → IO-3 + I- is a disproportionation reaction. |
| Statement II: | The oxidation number of Iodine can vary from -1 to +7. |
| 1. | Both (A) and (R) are True, and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True, but (R) does not correctly explain (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Redox Titration & Type of Redox |
61%
Level 2: 60%+
Hints
| Assertion (A): | In CrO5, the oxidation number of Cr is +6. |
| Reason (R): | CrO5 has a butterfly structure in which peroxide bonds are present. |
| 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, and (R) is False. |
| 4. | (R) is False, and (R) is true. |
Subtopic: Introduction to Redox and Oxidation Number |
80%
Level 1: 80%+
Hints
Given below are two statements:
| Assertion (A): | MnO2 can act as an oxidizing agent as well as a reducing agent. |
| Reason (R): | The oxidation state of Mn lies between the highest and lowest oxidation states. |
| 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. | Both (A) and (R) are False. |
Subtopic: Redox Titration & Type of Redox |
91%
Level 1: 80%+
Hints
| Assertion (A): | The oxidation number of S in H2S2O8 is 6. |
| Reason (R): | Maximum oxidation state of S is 6 because the maximum oxidation number of an element is equal to the number of valence electrons. |
| 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 and (R) is False. |
| 4. | (A) is False and (R) is True. |
Subtopic: Introduction to Redox and Oxidation Number |
71%
Level 2: 60%+
Hints
Given below are two statements:
| Assertion (A): | In the reaction between potassium permanganate and potassium iodide, permanganate ions act as an oxidising agent. |
| Reason (R): | The oxidation state of manganese changes from +2 to +7 during the reaction. |
| 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: Redox Titration & Type of Redox |
68%
Level 2: 60%+
Hints
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