Question

how local action and polarisation are avoided in a Lechlanche cell?​

Answer 1

Answer:

Local action and polarization are two types of defects discussed under batteries. The difference between local action and polarization is that local action can be minimized using a depolarizer such as manganese oxide whereas polarization can be minimized using pure zinc.

Answer 2

Explanation:

This defect can be avoided by using amalgamated zinc rods. Mercury dissolves zinc and allows only zinc atoms to come into contact with acid and thus avoids formation of local cells. Polarisation: The hydrogen ions reaching the negative electrode get accumulated preventing further neutralization of hydrogen ions.