Answer the following question:
Name three types of substances which produce a chemical effect when electric current is passed through them

Explanation

To answer the question about the three types of substances that produce a chemical effect when electric current is passed through them, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for types of substances that undergo a chemical change when electric current flows through them. This means we are looking for categories of substances that can ionize or decompose.

2. **Identifying the Types of Substances**:
- **Acid Solutions**: When acids are dissolved in water, they dissociate into ions. For example, hydrochloric acid (HCl) dissociates into H⁺ and Cl⁻ ions when dissolved in water. This process allows electric current to pass and creates a chemical effect.
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