Give construction and working of Dry cell.

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Accepted Answer

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> [!TLDR]
> The dry cell is a compact Leclanché-type primary cell: Zn container (anode), graphite rod (cathode) surrounded by MnO₂/carbon/NH₄Cl paste (electrolyte).
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> **Construction:**
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> - The outer casing is a cylindrical **zinc container**, which itself acts as the **anode**.
> - In the centre is a **graphite (carbon) rod**, surrounded by a compact paste/powder of **manganese dioxide ($MnO_2$) and carbon powder** — this rod acts as the **cathode**.
> - The space between the zinc container and the central rod is filled with a moist paste of **ammonium chloride ($NH_4Cl$) and zinc chloride ($ZnCl_2$)**, which serves as the electrolyte.
> - The whole assembly is sealed at the top, with the carbon rod projecting out as the positive terminal and the zinc case as the negative terminal.
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> **Working (electrode reactions):**
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> At the anode (zinc container), oxidation occurs:
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> $$Zn(s) \rightarrow Zn^{2+} + 2e^-$$
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> At the cathode, manganese dioxide is reduced (ammonium ions are also involved in the overall process):
> …

Q.Give construction and working of Dry cell.

Concept understanding — Commercial Cells and Batteries

Commercial Cells and Batteries

Q.Give construction and working of Dry cell.

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