Match Column-I (Types of cell) with Column-II (Characteristics shown by cells) and mark the appropriate option:
Column I (Type of cell) |
Column II (Characteristics) |
||
A | Lechlanche cell | 1. | Cell reaction 2H2 +O2 → 2H2O |
B | Ni-Cd cell | 2. | Does not involve any ion in solution and is used in hearing aids. |
C | Fuel cell | 3. | Rechargeable |
D | Mercury cell | 4. | -Reaction at anode, Zn → Zn2+ + 2e- |
Codes:
Options: | A | B | C | D |
1. | 2 | 3 | 4 | 1 |
2. | 4 | 3 | 1 | 2 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
a. | It is also known as the Leclanche cell. |
b. | The electrolyte is a moist paste of ammonium chloride (NH4Cl) and zinc chloride (ZnCl2 ). |
c. | The cathodic reaction is : MnO2 + NH4++ e-→ MnO(OH) + NH3 |
1. | Only a and b are correct | 2. | Only c is correct |
3. | Only b and c are correct | 4. | All are correct |
In a typical fuel cell, the reactants (R) and products (P) are:
1. | R = H2(g), O2(g); P = H2O2(l) |
2. | R = H2(g), O2(g); P = H2O(l) |
3. | R = H2(g), O2(g), C l2(g); P = HClO4(aq) |
4. | R = H2(g), N2(g); P = NH3(aq) |
1. | It consists of zinc-mercury amalgam as anode. |
2. | It consists of a paste of NH4Cl and ZnCl2 as electrolyte. |
3. | It consists of paste of HgO and carbon as cathode. |
4. | It is suitable for low current devices like hearing aids, watches etc. |