When copper is heated with conc. `HNO_(3)` it produces?

Options

A. `Cu(NO_(3))_(2)` and NO
B. `Cu(NO_(3))_(2)`, `N_(2)O`
C. `Cu(NO_(3))_(2)` and `N_(2)O`
D. `Cu(NO_(3))_(2)` and `NO_(2)`

Explanation

To determine what products are formed when copper is heated with concentrated nitric acid (HNO₃), we can analyze the reaction step by step.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are copper (Cu) and concentrated nitric acid (HNO₃).

2. **Understand the Nature of Concentrated HNO₃**:
- Concentrated nitric acid is a strong oxidizing agent. This means it can oxidize metals like copper.

3. **Write the Reaction**:
- When copper reacts with concentrated nitric acid, the reaction can be represented as:
\[ \text{Cu} + \text{HNO}_3 \rightarrow \text{Cu(NO}_3\text{)}_2 + \text{NO}_2 + \text{H}_2\text{O} \]
- Here, copper is oxidized to copper(II) nitrate (Cu(NO₃)₂), and nitric acid is reduced to nitrogen dioxide (NO₂).

4. **Balance the Reaction**:
- The balanced equation for the reaction is:
\[ 4 \text{Cu} + 8 \text{HNO}_3 \rightarrow 4 \text{Cu(NO}_3\text{)}_2 + 2 \text{NO}_2 + 4 \text{H}_2\text{O} \]
- This shows that four moles of copper react with eight moles of nitric acid to produce four moles of copper nitrate, two moles of nitrogen dioxide, and four moles of water.

5. **Identify the Products**:
- From the balanced equation, the products of the reaction when copper is heated with concentrated nitric acid are:
- Copper(II) nitrate (Cu(NO₃)₂)
- Nitrogen dioxide (NO₂)
- Water (H₂O)

### Final Answer:
When copper is heated with concentrated HNO₃, it produces copper(II) nitrate (Cu(NO₃)₂) and nitrogen dioxide (NO₂).

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