Long Answer Type
Short Answer Type| Electrode |
Standard reduction potential (volts) |
| Cd2+ | Cd | –0.40 |
| Ni2+|Ni | –0.25 |
| 2H+|H2 | –0.00 |
| Cu2+ | Cu | + 0.34 |
| Ag+ | + Ag | +0.53 |
Long Answer TypeUsing the standard electrode potentials given in the Table 8.1, predict if the
reaction between the following is feasible:
(a) Fe3+ (aq) and I- (aq)
(b) Ag+(aq) and Cu(s)
(c) Fe3+(aq) and Cu(s)
(d) Ag(s) and Fe3+(aq)
(e) Br2(aq) and Fe2+(aq)
Predict the products of electrolysis in each of the following:
(i) An aqueous solution of AgNO3 with silver electrodes.
ii)An aqueous solution AgNO3 with platinum electrodes.
iii) A dilute solution of H2SO4 with platinum electrodes.
iv) An aqueous solution of CuCl2 with platinum electrodes.
Short Answer TypeDepict the galvanic cell in which the reaction Zn(s) + 2Ag+ (aq) → Zn2+(aq) +2Ag(s)
takes place, Further show:
(i) which of the electrode is negatively charged,
(ii) the carriers of the current in the cell, and
(iii) individual reaction at each electrode.
The galvanic cell will be
Zn (s),Zn2+ (aq)// Ag+ (aq), Ag (s)
i)The Zn electrode will be negatively charged.
ii) Current will flow from silver electrode to zinc electrode.
Electrons flow from Zn to Cu outside ions carry current in the cell.
iii) Individual reaction at each electrode will be
At anode: Oxidation half reaction
Zn(s) -> Zn2+ +2e-
At cathode: Reduction half reaction
2Ag+ (Aq) +2e- -> 2Ag(s)
Multiple Choice QuestionsConsider the following reaction,
The values of x,y and z in the reaction are respectively
5,2 and 16
2,5 and 8
2,5 and 16
2,5 and 16
Which of the following chemical reactions depicts the oxidizing behaviour of H2SO4?
2HI+ H2SO4 →I2 +SO2+2HO
Ca(OH)2 +H2SO4 → CaSO4 +2H2O
NaCl +H2SO4 → NaHSO4 + HCl
NaCl +H2SO4 → NaHSO4 + HCl
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