Identify the incorrect statement(s) :

Engineering

Chemistry

Corrosion or Rusting

Batteries and Fuel Cell

Question

Identify the incorrect statement(s) :

In Nickel - Cadmium battery Cadmium acts as cathode during discharging.

During discharging of lead storage battery following reaction takes place.

2PbSO₄(s) + 2H₂O(ℓ) → PbO₂(s) + Pb(s) + 2HSO₄^–(aq) + 2H⁺(aq)

Zinc coating can protect iron from unwanted oxidation.

To deposit 2 mol of Ni from NiSO₄(aq) at cathode 4F of electricity is required.

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during discharging process lead oxidises

Cd-act as anode during discharging

Ni²⁺ + 2e¯ → Ni for 2 more 4F charge required

S.R.P of line is lower so it can protect Fe.