- 1(current)
Q. No.| Column-I | Column-II | ||
| (A) | \(Pb_{(s)} + SO^{2-}_{4(aq)} \rightarrow\\ PbSO_{4(s)}+ 2 e^-\) | (i) | Rusting of iron |
| (B) | \( SO^{2-}_{4(aq)} \rightarrow \\S_2O^{2-}_{8(aq)}+ 2 e^-\) | (ii) | Reaction at the anode in lead storage battery |
| (C) | \(2H_{2(g)} + 4OH^{-}_{(aq)} \rightarrow \\4 H_2O_{(l)}+ 4e^-\) | (iii) | Electrolysis of concentrated \(H_2SO_4\) |
| (D) | \(2Fe_{(s)} + O_{2(g)} + 4H^+_{(aq)} \rightarrow \\2Fe^{2+}_{(aq)}+ 2 H_2O_{(l)}\) | (iv) | Reaction at the anode in fuel cell |
1. (A) →(i), (B)→(ii), (C) →(iii), (D)→ (iv)
2. (A) →(ii), (B)→(iii), (C) →(iv), (D)→ (i)
3. (A) →(iii), (B)→(iv), (C) →(i), (D)→ (ii)
4. (A) →(iv), (B)→(i), (C) →(ii), (D)→ (iii)
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
1. Mercury Cell
2. Dry Cell
3. Lead cell
4. Nickel‐cadmium cell
1. Mercury Cell
2. Fuel Cell
3. Lead storage cell
4. Dry cell
A device that converts energy of the combustion of fuels like hydrogen and methane, directly
into electrical energy is known as:
1. Fuel cell
2. Electrolytic cell
3. Dynamo
4. Ni-Cd cell
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Match the items of Column-I and Column-II:
| Column-I | Column-II | ||
| 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- |
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
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To unlock all the explanations of this course, you need to be enrolled.
| 1. | \(\mathrm{2H_{2(g)} + O_{2(g)} \rightarrow 2H_2O_{(l)}}\) |
| 2. | \(\mathrm{2H_{2(g)} + 4OH^-_{(aq)} \rightarrow 4H_2O_{(l)} + 4e^-}\) |
| 3. | \(\mathrm{O_{2(g)} + 2H_2O_{(l)}+4e^- \rightarrow 4OH^-_{(aq)}}\) |
| 4. | \(\mathrm{4OH^-_{(aq)} + 4e^- \rightarrow 2H_2O_{(l)}}\) |
1. Velocity of \(K^+\) is greater than that of \(NO^-_3\).
2. Velocity of \(NO^-_3\) is greater than that of \(K^+\) .
3. Velocities of both \(K^+\) and \(NO^-_3\) are nearly the same.
4. \(KNO_3\) is highly soluble in water.
- 1(current)
Q. No.
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