From the following list of metals, choose the metal which fits into the given description.
Zinc, Sodium, Silver, Lead, Iron.
This metal reacts reversibly with steam when it is red hot and produces its oxide and hydrogen.

Explanation

To solve the question, we need to identify which metal from the given list reacts reversibly with steam when it is red hot, producing its oxide and hydrogen gas. Let's analyze each metal step by step.

### Step 1: Understand the Reaction with Steam
We are looking for a metal that can react with steam (water vapor) at high temperatures. The reaction typically produces a metal oxide and hydrogen gas.

### Step 2: Analyze Each Metal
1. **Zinc**: Zinc does react with steam, but it does not do so reversibly. It forms zinc oxide and hydrogen gas.

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