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. |
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 |
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. |
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. |
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)
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 |