Q. Among the following cells Leclanche cell (I), Nickel cadmium cell (II), Lead storage battery (III), Mercury cell (IV), primary cells are

 2190  239 KEAMKEAM 2010Electrochemistry Report Error

Solution:

A primary cell is a battery that is designed to be used once and discarded, and not recharged with electricity and reused.
Leclanche cell and Mercury cell are primary cells whereas Nickle-Cadmium cell and Lead Storage battery are secondary cells.