Batteries contain what?

Batteries contain what?

• A. Lead and sulfuric acid
• B. Copper and nickel
• C. Aluminum and water
• D. Zinc and phosphate

Answer: (A)

The main idea here is the composition of the common lead‑acid battery. In this type of battery, the electrodes are made of lead compounds and the electrolyte is sulfuric acid. This combination stores and releases electrical energy through chemical reactions between the lead electrodes and the sulfuric acid. Other material pairings aren’t used in this standard battery chemistry. Copper and nickel are associated with different battery chemistries, but not as the primary lead-acid composition. Aluminum and water, and zinc with phosphate, don’t describe the typical lead‑acid design or its common alternatives.

The main idea here is the composition of the common lead‑acid battery. In this type of battery, the electrodes are made of lead compounds and the electrolyte is sulfuric acid. This combination stores and releases electrical energy through chemical reactions between the lead electrodes and the sulfuric acid.

Other material pairings aren’t used in this standard battery chemistry. Copper and nickel are associated with different battery chemistries, but not as the primary lead-acid composition. Aluminum and water, and zinc with phosphate, don’t describe the typical lead‑acid design or its common alternatives.