Q. No.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.
Given below are two statements:
| Assertion (A): | Among halogens, fluorine is the best oxidant. |
| Reason (R): | Fluorine is the most electronegative atom. |
| 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. |
Match the items in Column I with relevant items in Column II.
|
Column I |
Column II |
|
A. Ions having a positive charge |
1. +7 |
|
B. The sum of oxidation number of all atoms in a neutral molecule |
2. -1 |
|
C. Oxidation number of hydrogen ion. (H+) |
3. +1 |
|
D. Oxidation number of fluorine in NaF |
4. 0 |
|
E. Ions having a negative charge |
5. Cation |
|
6. Anion |
Codes
| Options: | A | B | C | D | E |
| 1. | 5 | 4 | 3 | 2 | 6 |
| 2. | 1 | 2 | 3 | 5 | 4 |
| 3. | 5 | 4 | 3 | 2 | 1 |
| 4. | 4 | 5 | 3 | 2 | 1 |
Given below are two statements:
| Assertion (A): | The decomposition of hydrogen peroxide to form water and oxygen is an example of a disproportionation reaction. |
| Reason (R): | The oxygen of peroxide is in –1 oxidation state and it is converted to zero oxidation state in O2 and –2 oxidation state in H2O. |
| 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. |
| Assertion (A): | In the presentation \( \mathrm{E}_{\mathrm{Fe}^{3+}}^{\ominus} /_{ \mathrm{Fe}^{2+}}\) \( \text { and } \mathrm{E}_{\mathrm{Cu}^{2+}}^{\ominus} / _{\mathrm{Cu}^{\prime}} \mathrm{Fe}^{3+} / \mathrm{Fe}^{2+} \) and\(\text { } \mathrm{Cu}^{2+} / \mathrm{Cu}\) are reodox couples |
| Reason (R): | A redox couple is the combination of the oxidised and reduced forms of a substance involved in an oxidation or reduction half cell. |
| 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. |
Which of the following statement(s) is/are not true about the following decomposition reaction?
| a. | Potassium is undergoing oxidation |
| b. | Chlorine is undergoing oxidation |
| c. | Oxygen is reduced |
| d. | None of the species are undergoing oxidation or reduction |
The correct choice among the above is -
1. (a, b, d)
2. (b, c, d)
3. (b, d, a)
4. None of the above
Identify the correct statement(s) in relation to the following reaction.
(a) Zinc is acting as an oxidant
(b) Chlorine is acting as a reductant
(c) Hydrogen ion is acting as an oxidant
(d) Zinc is acting as a reductant
The correct choice among the above is -
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Identify the correct statements regarding the given reaction:
| a. | Phosphorus undergoes reduction only |
| b. | Phosphorus undergoes oxidation only |
| c. | Phosphorus undergoes oxidation as well as reduction |
| d. | Hydrogen undergoes neither oxidation nor reduction |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
For the reaction:
H2S (g) + Cl2 (g) → 2 HCl (g) + S (s)
The correct statement(s) in the balanced equation is(are):
a. H2S is oxidised
b. Cl2 is reduced
c. H2S is reduced
d. Cl2 is oxidised
1. a, b
2. b, c
3. c, d
4. a, d
Match the items in column I with column II.
(O.S = oxidation state)
| Column I | Column II |
| a. Au O.S in HAuCl4 | i. +2 |
| b. Tl O.S in Tl2O | ii. +1 |
| c. Fe O.S in FeO | iii. +3 |
| d. Cu O.S in CuI |
1. a=i; b=ii; c=iii; d=ii
2. a=iii; b=i; c=ii; d=ii
3. a=iii; b=ii; c=i; d=ii
4. a=ii; b=i; c=iii; d=ii
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