| (I) Leclanche cell |
| (II) Nickel-Cadmium cell |
| (III) Lead storage battery |
| (IV) Mercury cell primary cells are |
A) I and II
B) I and III
C) II and III
D) I and IV
Correct Answer: D
Solution :
[d] Primary cells are those cells, in which the reaction occurs only once and after use over a period of time, it becomes dead and cannot be reused again, e.g., Leclanche cell and mercury cell.
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