Multiple choice

Which of the following metals is used in a car battery?

  1. Zinc

  2. Lead

  3. Magnesium

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Car batteries are lead-acid batteries, using lead dioxide as the positive plate and sponge lead as the negative plate, with sulfuric acid as the electrolyte. The lead-acid chemistry provides the high current needed for engine starting and the rechargeability required for automotive use. This technology has been the standard for over 100 years.

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