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← ScienceWhich outcome occurs in a sealed lead-acid battery near full capacity when applying a constant overcharge?
A)Gassing and water electrolysis increase✓
B)Plate sulfation becomes the dominant reaction
C)Internal resistance is minimized rapidly
D)Active material shedding ceases irreversibly
💡 Explanation
Gassing increases with overcharge because the electrochemical driving force exceeds the equilibrium potential for water electrolysis, forming hydrogen and oxygen via charge transfer; therefore, gassing occurs, rather than sulfation dominating because acid concentration remains high delaying equilibrium shift.
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