The products formed when metals react with dilute acids are:

Options

A. Salt and water
B. Salt and hydrogen gas
C. Salt and carbon dioxide gas
D. Salt, water and carbon dioxide gas

Explanation

To answer the question about the products formed when metals react with dilute acids, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: When a metal reacts with a dilute acid, the reactants involved are the metal (e.g., zinc, magnesium) and the dilute acid (e.g., hydrochloric acid, sulfuric acid).

2. **Understand the Reaction**: The general reaction can be represented as:
\[ \text{Metal} + \text{Dilute Acid} \rightarrow \text{Salt} + \text{Hydrogen Gas} \]
Here, the metal displaces hydrogen from the acid.

3. **Example Reaction**: Let's take zinc reacting with dilute sulfuric acid as an example:
\[ \text{Zn} + \text{H}_2\text{SO}_4 \rightarrow \text{ZnSO}_4 + \text{H}_2 \]
In this reaction, zinc displaces hydrogen from sulfuric acid, forming zinc sulfate (the salt) and hydrogen gas.

4. **Identify the Products**: From the example, we can see that the products formed are:
- **Salt**: Zinc sulfate (ZnSO₄)
- **Hydrogen Gas**: H₂

5. **General Conclusion**: Therefore, the products formed when metals react with dilute acids are generally a salt and hydrogen gas.

### Final Answer:
The products formed when metals react with dilute acids are **salt and hydrogen gas**.

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