- 1(current)
Q. No.| 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
The correct statement regarding dry cells among the following is:
| 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 |
Subtopic: Batteries & Salt Bridge |
76%
Level 2: 60%+
Hints
Match the items of Column I and Column II.
|
Column I |
Column II |
|
A. Lechlanche cell B. Ni-Cd cell C. Fuel cell D. Mercury cell |
1. Cell reaction 2H2 +O2 —> 2H2O 2. Does not involve any ion in solution and is used in hearing aids. 3. Rechargeable 4, Reaction at anode, Zn ——> Zn2+ + 2e-
|
1)A-2,B-1,C-4,D-3
2)A-1,B-2,C-3,D-4
3)A-3,B-2,C-1,D-4
4)A-4,B-3,,C-1,D-2
Subtopic: Batteries & Salt Bridge |
82%
Level 1: 80%+
Hints
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 galvanisation |
| C. | Fuel cell | 3. | Gives steady potential |
| D. | Rusting | 4. | Pb is anode, PbO2 is cathode |
Correct option is:
1. A-1,B-2,C-3,D-4
2. A-4,B-2,C-3,D-1
3. A-4,B-3,C-1,D-2
4. A-4,B-3,C-2,D-1
Subtopic: Batteries & Salt Bridge |
93%
Level 1: 80%+
Hints
- 1(current)
Q. No.
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