In the formation of leclanche cell, the space between electrodes is filled with:

(A) \(ZnCl_2\)

(B) \(NH_4Cl\)

(C) \(AlCl_3\)

(D) \(Zns\)

(E) \(NH_4NO_3\)

Choose the correct answer from the options given below:

(A) and (B) only

The correct answer is option 2. (A) and (B) only.

In the formation of a Leclanché cell, the electrolyte plays a crucial role in facilitating the flow of ions between the electrodes during the electrochemical reactions. Let's explain the options provided:

(A) \(ZnCl_2\) - Zinc chloride is a common choice as an electrolyte in Leclanché cells. When dissolved in water, zinc chloride dissociates into zinc ions (\(Zn^{2+}\)) and chloride ions (\(Cl^-\)). These ions help to maintain electrical neutrality in the cell and facilitate the movement of charge during the cell's operation.

(B) \(NH_4Cl\) - Ammonium chloride is another commonly used electrolyte in Leclanché cells. When dissolved in water, ammonium chloride dissociates into ammonium ions (\(NH_4^+\)) and chloride ions (\(Cl^-\)). These ions also contribute to the conductivity of the electrolyte and enable the flow of charge within the cell.

(C) \(AlCl_3\) - Aluminum chloride is not typically used as an electrolyte in Leclanché cells. While aluminum chloride can dissociate into aluminum ions (\(Al^{3+}\)) and chloride ions (\(Cl^-\)), it is not commonly employed in Leclanché cells due to other considerations such as cell performance and safety.

(D) \(ZnS\) - Zinc sulfide is not used as an electrolyte in Leclanché cells. Zinc sulfide is a compound that does not readily dissociate into ions in water and is not suitable for use as an electrolyte in electrochemical cells like Leclanché cells.

(E) \(NH_4NO_3\) - Ammonium nitrate is not a common choice as an electrolyte in Leclanché cells. While ammonium nitrate can dissociate into ammonium ions (\(NH_4^+\)) and nitrate ions (\(NO_3^-\)), it is not typically used in Leclanché cells due to other considerations such as compatibility with cell components and performance.

So, the correct answer is option 2, which includes \(ZnCl_2\) and \(NH_4Cl\) as the electrolytes commonly used in Leclanché cells. These electrolytes provide the necessary ions for the electrochemical reactions to occur and help maintain the conductivity of the cell.