Question

The positive electrode of a Leclanche cell is made of:

• A. carbon
• B. copper
• C. zinc
• D. iron

Answer 1

Answer: (C)

The explanation for the correct option:

Option(C) zinc

The positive electrode of the Leclanche cell is cathodic and it is made up of a carbon graphite rod coated with ${MnO}_2$. and the anode ($-ve$ charge) is made of $Zn$ metal.

Leclanche cell

• A Leclanche cell consists of a glass vessel that is filled with ammonium chloride solution.
• Ammonium chloride solution acts as an electrolyte.
• In it, there stands a zinc rod and porous pot containing a carbon rod, which is packed around with a mixture of manganese dioxide and powdered carbon.
• The carbon and zinc rods act as positive and negative electrodes respectively.

Hence, Option(C) zinc is the positive electrode of a Leclanche cell.