Question

Which two compounds are used in batteries?

sulfuric acid and potassium hydroxide
ammonium hydroxide and nitric acid
potassium hydroxide and nitric acid
sulfuric acid and ammonium hydroxide

Answer 1

The two compounds commonly used in batteries are sulfuric acid and potassium hydroxide.

- **Sulfuric acid** is typically used in lead-acid batteries, which are widely used in cars and other vehicles.
- **Potassium hydroxide** is often used in alkaline batteries and nickel-cadmium (NiCad) batteries.

Thus, the correct pair from the options given is **sulfuric acid and potassium hydroxide**.