Question 89Electricity & Electronics - QMED

The correct answer is B) potassium hydroxide. Nickel-cadmium (Ni-Cd) batteries use a potassium hydroxide (KOH) electrolyte solution, not distilled water alone. The KOH electrolyte allows the battery to function properly by facilitating the electrochemical reactions between the nickel and cadmium electrodes. The other answer choices are incorrect because: A) lead sulfate is the electrolyte used in lead-acid batteries, not Ni-Cd batteries; C) zinc oxide is not used as an electrolyte; and D) diluted sulfuric acid is the electrolyte for lead-acid batteries, not Ni-Cd batteries.