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Q. No.Match the compounds in column I with the oxidation state of Cl in column II.
Column I
Column II
a. Cl2O7
i. +4
b. NaClO3
ii. +1
c. Cl2O
iii. +5
d. ClO2
iv. +7
Options:
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 |
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Match the items in column I with column II.
(O.S = oxidation state)
1. a=i; b=ii; c=iii
2. a=ii; b=iii; c=i
3. a=iii; b=ii; c=i
4. a=ii; b=i; c=iii
(O.S = oxidation state)
| Column I | Column II |
| a. Fe O.S in Fe2O3 | i. +2 |
| b. Mn O.S in MnO2 | ii. +3 |
| c. Mn O.S in MnO | iii. +4 |
1. a=i; b=ii; c=iii
2. a=ii; b=iii; c=i
3. a=iii; b=ii; c=i
4. a=ii; b=i; c=iii
Subtopic: Introduction to Redox and Oxidation Number |
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For the following reaction,
2Na(s) + H2(g) → 2NaH(s)
The correct statement(s) in the balanced equation is(are):
a. Na is oxidized
b. H2 is oxidized
c. H2 is reduced
d. It is a disproportionation reaction
1. a, b
2. b, c
3. c, a
4. a, d
2Na(s) + H2(g) → 2NaH(s)
The correct statement(s) in the balanced equation is(are):
a. Na is oxidized
b. H2 is oxidized
c. H2 is reduced
d. It is a disproportionation reaction
1. a, b
2. b, c
3. c, a
4. a, d
Subtopic: Oxidizing & Reducing Agents |
78%
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For the reaction:
Fe3O4 (s) + Al (s) → Fe (s) + Al2O3 (s)
The correct statement(s) in the equation is(are):
| a. | Stoichiometric coefficient of Fe is 9. |
| b. | Aluminium is oxidized |
| c. | Ferrous ferric oxide (Fe3O4) is oxidize |
| d. | Aluminium is reduced. |
1. a, c
2. a, b
3. b, c
4. c, d
Subtopic: Oxidizing & Reducing Agents |
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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 |
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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%
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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 |
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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 |
54%
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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%
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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%
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