Using the standard electrode potentials of the redox couples given below, which of the following is the strongest oxidizing agent?
1. Fe3+
2. I2(s)
3. Cu2+
4. Ag+
values of some redox couples are given below. On the basis of these values choose the correct option.
1. | Cu will reduce Br– | 2. | Cu will reduce Ag |
3. | Cu will reduce I– | 4. | Cu will reduce Br2 |
In the reactions given below, thiosulphate reacts differently with iodine than with bromine.
Choose the statements among the following that best describe the above dual behaviour of thiosulphate.
1. | Bromine is a stronger oxidant than iodine. |
2. | Bromine is a weaker oxidant than iodine. |
3. | Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions. |
4. | Bromine undergoes oxidation and iodine undergoes reduction in these reactions. |
The incorrect statement regarding the rule to find the oxidation number among the following is:
1. | The oxidation number of hydrogen is always +1. |
2. | The algebraic sum of all the oxidation numbers carried by elements in a compound is zero. |
3. | An element in its free or uncombined state has an oxidation number of zero. |
4. | Generally, in all its compounds, the oxidation number of fluorine is -1. |
Which of the following arrangements represents the increasing oxidation number of the central atom?
1.
2.
3.
4.
Identify the disproportionation reaction among the following:
1.
2.
3.
4.
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. |
The compound AgF2 (unstable) acts as a/ an:
1. Oxidising agent.
2. Reducing agent.
3. Both oxidising and reducing agent.
4. Neither oxidising and reducing agent.
Among the following hydrohalic compounds, the best reductant is -