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Q. No.Assertion(A): In some cases, oxygen shows a positive oxidation number though it is an electronegative element.
Reason(R): Fluorine is more electronegative than oxygen.
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 and R both are false.
Subtopic: Introduction to Redox and Oxidation Number |
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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 but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.
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 but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.
Subtopic: Introduction to Redox and Oxidation Number |
80%
From NCERT
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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 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 and R both are false.
Reason(R): All oxygen atoms have -2 oxidation number.
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 and R both are false.
Subtopic: Introduction to Redox and Oxidation Number |
74%
From NCERT
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Assertion(A): Amongst the halogens, fluorine can oxidize the elements to the highest oxidation state.
Reason(R): Due to the small size of fluoride ions, it is difficult to oxidize fluoride ions to fluorine. Hence reverse reaction takes place more easily.
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 and R both are false.
Reason(R): Due to the small size of fluoride ions, it is difficult to oxidize fluoride ions to fluorine. Hence reverse reaction takes place more easily.
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 and R both are false.
Subtopic: Oxidizing & Reducing Agents |
66%
From NCERT
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Assertion: Fluorine exists only in -1 oxidation state.
Reason: Fluorine has 2s22p5 configuration.
1. Both statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Reason: Fluorine has 2s22p5 configuration.
1. Both statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Subtopic: Introduction to Redox and Oxidation Number |
51%
From NCERT
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Assertion: l2 → IO-3 + I-. This reaction is a disproportionation reaction.
Reason: Oxidation number of I can vary from -1 to +7.
1. Both statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Reason: Oxidation number of I can vary from -1 to +7.
1. Both statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Subtopic: Redox Titration & Type of Redox |
55%
From NCERT
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Assertion: In CrO5, the oxidation number of Cr is +6.
Reason: CrO5 has a butterfly structure in which peroxide bonds are present.
Reason: CrO5 has a butterfly structure in which peroxide bonds are present.
| 1. | Both statements are TRUE and Reason is the correct explanation of Assertion. |
| 2. | Both statements are TRUE but Reason is NOT the correct explanation of Assertion. |
| 3. | Assertion is TRUE and Reason is FALSE. |
| 4. | Assertion is FALSE and Reason is TRUE. |
Subtopic: Introduction to Redox and Oxidation Number |
79%
From NCERT
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Assertion: MnO2 can act as an oxidizing agent as well as a reducing agent.
Reason: The oxidation state of Mn lies between the highest and lowest oxidation state.
1. Both statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Reason: The oxidation state of Mn lies between the highest and lowest oxidation state.
1. Both statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Subtopic: Redox Titration & Type of Redox |
91%
From NCERT
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Assertion: The oxidation number of S in H2S2O8 is 6.
Reason: 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 statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Reason: 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 statements are TRUE and Reason is the correct explanation of Assertion.
2. Both statements are TRUE but Reason is NOT the correct explanation of Assertion.
3. Assertion is TRUE and Reason is FALSE.
4. Assertion is FALSE and Reason is TRUE.
Subtopic: Introduction to Redox and Oxidation Number |
71%
From NCERT
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Match the compounds in column I with the oxidation state of Cl in column II.
Options:
| Column I | Column II |
| a. Cl2O7 | i. +4 |
| b. NaClO3 | ii. +1 |
| c. Cl2O | iii. +5 |
| d. ClO2 | iv. +7 |
| a | b | c | d | |
| 1. | iii | iv | ii | i |
| 2. | ii | iii | iv | i |
| 3. | iv | iii | ii | i |
| 4. | iv | i | iii | ii |
Subtopic: Introduction to Redox and Oxidation Number |
90%
From NCERT
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