________ is due to the formation of hydrogen gas bubbles around the copper plate of

Explanation

In a simple cell, such as the Daniell cell, there are two electrodes made of different metals immersed in an electrolyte. One of the electrodes is made of copper. During the electrochemical reactions occurring in the cell, hydrogen gas bubbles may form around the copper electrode.

Polarization is the correct answer here because it refers to the buildup of excess charges or a decrease in the difference in potential between the two electrodes, which can hinder the flow of electrons and the overall functioning of the cell. In this case, the formation of hydrogen gas bubbles around the copper plate leads to polarization.

Here is a brief description of the other options:

Depolarization is the process of reversing or reducing polarization, usually by adding a substance that reacts with the hydrogen gas or other polarizing species to prevent their buildup.

Local action refers to unwanted side reactions that occur at the surface of an electrode, leading to corrosion and reduced efficiency of the cell. This is not related to the hydrogen gas bubbles forming around the copper plate.

Amalgamation is a process used in some electrochemical cells, where the surface of an electrode (usually zinc) is coated with a thin layer of mercury to reduce local action and polarization. This option is not directly related to the formation of hydrogen gas bubbles around the copper plate.

Therefore, the formation of hydrogen gas bubbles around the copper plate of a simple cell is due to polarization.