- 1(current)
Q. No.
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The correct statement about charging of the lead storage battery is:
| 1. | PbSO4 anode is reduced to Pb. |
| 2. | PbSO4 cathode is reduced to Pb. |
| 3. | PbSO4 cathode is oxidised to Pb. |
| 4. | PbSO4 anode is oxidised to PbO2. |
Subtopic: Batteries & Salt Bridge |
Level 3: 35%-60%
Hints
Links
Match the items of Column I and Column II.
| Column I | Column II | ||
| A | Lead storage battery | 1. | Maximum efficiency |
| B | Mercury cell | 2. | Prevented by galvanization |
| C | Fuel cell | 3. | Gives steady potential |
| D | Rusting | 4. | Pb is an anode, PbO2 is cathode |
Codes:
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 3 | 1 | 2 |
Subtopic: Batteries & Salt Bridge |
91%
Level 1: 80%+
Hints
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 |
Subtopic: Batteries & Salt Bridge |
84%
Level 1: 80%+
Hints
| Assertion (A): | Mercury cell does not give steady potential. |
| Reason (R): | In the cell reaction, ions are not involved in the solution. |
| 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. |
Subtopic: Batteries & Salt Bridge |
62%
Level 2: 60%+
Hints
- 1(current)
Q. No.
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