A carbon rod as the positive pole
Pure zinc as the negative pole
Potassium permanganate solution in contact with the positive pole
common salt solution
Explanation
No explanation available
Video Explanation
No video available
Post your Contribution
Discussions (14)
Local action may be prevented by using pure zinc (which
is not practical), by coating the zinc with mercury, or by
adding a small percentage of mercury to the zinc during
the manufacturing process. ... When the cell is delivering
current to a load, the mercury continues to act on the
impurities in the zinc.
hence B 
a Leklanche cell is an early type of battery, or galvanic cell, and it consists of a zinc anode (negative pole), a carbon cathode (positive pole), and an electrolyte ( a chemical medium that allows the flow of electrical charge).
option c, using a potassium permanganate solution in contact with the positive pole, is the correct answer. this is because potassium permanganate acts as a depolarizer, which helps to reduce the buildup of gases that can interfere with the battery's operation. It essentially reduces the local action by making the cell more efficient and preventing unwanted chemical reactions.
options A, B, and D not effectively reduce local action. A carbon rod as the positive pole (option A) is already a standard component of a leclanche cell and does not inherently reduce local action. As the negative pole (Option B) might actually increase local action due to the presence of impurities in the zinc. A common salt solution (option D) is not typically used in a Leclanche cell and it's not known to reduce local action.
Therefore, answer is C --- Potassium permanganate solution in contact with the positive pole.
Myschool pls rectify the answer
The correct option is B
Remember the Zinc is in the cathode(negative electrode)
So adding kmno4 to the positive anode instead of negative electrode will not affect the Zinc which would also not prevent local action
