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Which risk increases when a nickel-metal hydride battery's anode potential decreases significantly during discharge?

A)Rupture the pressure relief valve
B)Electrolyte solution freezing solid
C)Hydrogen evolution accelerates rapidly
D)Nickel hydroxide precipitation ceases swiftly

💡 Explanation

Hydrogen evolution increases with decreasing anode potential due to electrolysis of the electrolyte. This electrochemical reaction consumes the electrolyte water, therefore creating an increase in hydrogen gas rather than electrolyte freezing or material precipitation under normal battery design parameters.

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