Sodium reacts with dilute hydrochloric acid. Name the gas evolved.

Explanation

**Step-by-Step Solution:**

1. **Identify the Reactants:**
- The reactants in this reaction are sodium (Na) and dilute hydrochloric acid (HCl).

2. **Understand the Reaction Type:**
- This is a single displacement reaction where a more reactive metal (sodium) displaces a less reactive element (hydrogen) from its compound (HCl).

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