 In a Leclanche (dry) cell, the anode and the depolariser/cathode reactive species are respectively:
ACu container (anode) and MnO₂ (cathode)
BPb (anode) and PbO₂ (cathode)
CCarbon (anode) and Zn (cathode)
DZn container (anode) and MnO₂ in a paste of NH₄Cl + ZnCl₂ (cathode)
Answer & Solution
Correct answer: D. Zn container (anode) and MnO₂ in a paste of NH₄Cl + ZnCl₂ (cathode)
Dry cell: **Zn container = anode**, central carbon rod surrounded by **MnO₂ + carbon in NH₄Cl/ZnCl₂ paste = cathode**. EMF ≈ 1.5 V. Mn reduced from +4 → +3 at cathode. (Pb/PbO₂ is the lead-acid battery.)
Related questions
For an electrochemical cell operating spontaneously, ΔG° is related to E°_cell byWhich of the following statements about electrode potentials is INCORRECT?The overall cell reaction of the lead storage battery on discharge isThe primary cell that cannot be reused after its EMF drops to zero is exemplified byRusting of iron requires which two chemicals in contact with the metal?Fuel cells directly convertThe specific conductivity of a 0.1 M KCl solution is 1.29 × 10⁻² S/cm. The molar conductivMolar conductivity of a strong electrolyte at concentration c is related to its limiting v