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 -
From the following, identify the reaction having the top position in the EMF series (standard reduction potential) according to their electrode potential at 298 K.
1. Mg2++ 2e–Mg(s)
2. Fe2+ + 2e– Fe(s)
3. Au3++ 3e–Au(s)
4. K++ le –K(s)
Standard reduction potentials of the half-reactions are given below:
The strongest oxidizing and reducing agents, respectively, are:
1. and
2. and
3. and
4. and
A solution contains Fe2+, Fe3+ and I– ions. This solution was treated with iodine at 35°C. E° for Fe3+/Fe2+ is +0.77 V and E° for I2/2I– = 0.536 V.
The favourable redox reaction is:
1. Fe2+ will be oxidized to Fe3+.
2. I2 will be reduced to I–.
3. There will be no redox reaction.
4. I– will be oxidized to I2.
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): | 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. |
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. |