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 -
Identify the disproportionation reaction among the following:
1.
2.
3.
4.
Which of the following arrangements represents the increasing oxidation number of the central atom?
1.
2.
3.
4.
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. |
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. |
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 |
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+