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
Which of the following is the strongest oxidising agent?
1.
2.
3.
4.
The standard electrode potential (E°) values of Al3+/ Al, Ag+ / Ag, K+ / K, and Cr3+ / Cr are –1.66 V, 0.80 V, –2.93 V, & –0.79 V respectively. The correct decreasing order of the reducing power of the metals is:
| 1. | Ag > Cr > Al > K | 2. | K > Al > Cr > Ag |
| 3. | K > Al > Ag > Cr | 4. | Al > K > Ag > Cr |
| (a) | \(E_{k^+/K}^o = - 2.93\ V\); \(E_{Ag^+/Ag}^o = 0.80\ V\) |
| (b) | \(E_{Hg^{2+}/Hg}^o = 0.79\ V\); \(E_{Mg^{2+}/Mg}^o = - 2.37\ V\) |
| (c) | \(E_{Cr^{3+}/Cr}^o = -0.74\ V\) |
The correct arrangement of increasing order for reducing power of elements is:
| 1. | \(\mathrm{Ag}<\mathrm{Hg}<\mathrm{Cr}<\mathrm{Mg}<\mathrm{K} \) |
| 2. | \(\mathrm{Ag}>\mathrm{Cr}>\mathrm{Mg}>\mathrm{Hg}>\mathrm{K}\) |
| 3. | \(\mathrm{K}>\mathrm{Mg}<\mathrm{Cr}<\mathrm{Hg}>\mathrm{Ag} \) |
| 4. | \(\mathrm{K}<\mathrm{Mg}<\mathrm{Cr}<\mathrm{Hg}<\mathrm{Ag}\) |
The correct statement about electrolysis of an aqueous solution of with Pt electrode is-
| 1. | Cu2+ ion reduced at the cathode; Cl- ion oxidized at the anode |
| 2. | Cu2+ ion reduced at the anode; Cl- ion oxidized at the cathode |
| 3. | Cu2+ ion reduced at the cathode; H2O ion oxidized at the anode |
| 4. | H2O ion reduced at the cathode; Cl- ion oxidized at the anode |
The correct statement about the electrolysis of an aqueous solution of with Pt electrode is:
| 1. | Pt(s) gets oxidized at cathode whereas Ag + ( aq ) gets reduced at anode |
| 2. | Ag+ (aq) gets reduced at cathode and is oxidized at anode |
| 3. | Ag+ (aq) gets reduced at cathode whereas water is oxidized at anode |
| 4. | Ag (s) gets oxidized at cathode whereas H2O is oxidised at anode |