The common impurity in the electrolyte of lead-acid battery is_____________?
Correct answer: D. iron
- A. chlorine
- B. dust particles
- C. lead crystals
- D. iron
Explanation
Iron is a harmful and common impurity in lead-acid battery electrolyte, where it can increase self-discharge and interfere with normal operation. Chlorine, dust, and lead crystals are not the standard answer for dissolved electrolyte impurity.
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