Metals like …………. , …………. and ........... give `H_2` with steam.

Answer

To solve the question, we need to identify three metals that can react with steam to produce hydrogen gas. Let's go through the solution step by step:

### Step 1: Understanding the Reaction with Steam
- Metals like magnesium, zinc, and iron can react with steam (H2O in gaseous form) to produce hydrogen gas (H2).
- These metals do not react with cold or hot water due to the formation of a protective oxide layer on their surface.

### Step 2: Identifying the Metals
- **Magnesium (Mg)**: When magnesium reacts with steam, it forms magnesium oxide (MgO) and hydrogen gas (H2).
- Reaction:
\[ Mg + H_2O(g) \rightarrow MgO + H_2 \]

- **Zinc (Zn)**: Zinc also reacts with steam to produce zinc oxide (ZnO) and hydrogen gas.
- Reaction:
\[ Zn + H_2O(g) \rightarrow ZnO + H_2 \]

- **Iron (Fe)**: Iron reacts with steam to form ferric oxide (Fe2O3) and hydrogen gas.
- Reaction:
\[ 2Fe + 3H_2O(g) \rightarrow Fe_2O_3 + 3H_2 \]

### Step 3: Conclusion
- The three metals that give hydrogen gas when reacting with steam are:
- Magnesium
- Zinc
- Iron

### Final Answer
Metals like **Magnesium, Zinc, and Iron** give H2 with steam.

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