Electrochemistry - Result Question 19
####19. When a lead storage battery is discharged
(1986, 1M)
(a) $SO _2$ is evolved
(b) lead is formed
(c) lead sulphate is consumed
(d) sulphuric acid is consumed
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Answer:
Correct Answer: 19. $\left(300 cm^{2}\right)$
| 1. (a) | 2. (c) | 3. (b) | 4. (c) |
|---|---|---|---|
| 5. (d) | 6. (a) | 7. (a) | 8. (b) |
| 9. (b) | 10. (c) | 11. (c) | 12. (a) |
| 13. (c) | 14. (a) | 15. (d) | 16. (a) |
| 17. (d) | 18. (d) | 19. (b) | 20. (b) |
| 21. (b) | 22. (b) | 23. (c) | 24. $(-14.16)$ |
| 25. (b) | 26. (d) | 27. (b) | 28. (c) |
| 29. (c) | 30. (d) | 31. (a) | 32. (b) |
| 33. (c) | 34. (d) | 35. (55) | 37. $\left(10^{10}\right)$ |
| 38. $(0.05 M)$ | 40. $\left(2.45 \times 10^{-12}\right)$ | 41. $\left(5.89 \times 10^{7}\right)$ | |
| 42. $\left(6.88 \times 10^{12}\right)$ | 43. $(-0.222 V)$ 44. $(0.7926 V)$ | 46. $\left(1.7 \times 10^{17}\right)$ | |
| 47. $\left(1.57 \times 10^{-9}\right)$ | 48. $\left(1.04 \times 10^{-14}\right)$ | 49. $(8.6)$ | |
| 52. $\left(6 \times 10^{2} S cm^{-}\right.$ | $\left.mol^{-1}\right)$ | 53. $(4 mol)$ |
Solution:
- In a lead storage battery, sulphuric acid is consumed as :
$$ Pb+PbO _2+2 H _2 SO _4 \longrightarrow 2 PbSO _4+2 H _2 O $$
