Hydrogen is not normally evolved when using a metal and dilute nitric acid.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Reaction**: When a metal reacts with dilute nitric acid, we typically expect hydrogen gas to be released. However, this is not the case with dilute nitric acid.

2. **Identifying the Nature of Nitric Acid**: Dilute nitric acid (HNO3) is a strong oxidizing agent. This means it has the ability to accept electrons from other substances during a chemical reaction.

3. **Reaction Mechanism**: When a metal reacts with dilute nitric acid, the metal would normally release hydrogen gas (H2). However, because nitric acid is a strong oxidizer, it reacts with the hydrogen gas that is produced.

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