The example of solid solution is

Options

A. Glucose in water
B. Copper in gold
C. Camphor in nitrogen
D. Oxygen in nitrogen

Answer

To determine an example of a solid solution, we need to understand the definition of a solid solution and analyze the options provided.

### Step-by-Step Solution:

1. **Understand Solid Solutions**: A solid solution is a homogeneous mixture where the solute is dissolved in a solid solvent. This means that both components are in a solid state.

2. **Identify the Solvent**: In a solid solution, the solvent must be a solid. The solute can be a solid, liquid, or gas, but for the solution to be classified as a solid solution, the primary component (solvent) must be solid.

3. **Evaluate the Options**:
- **Option 1: Glucose in Water**: Here, the solvent is water (liquid), which does not qualify as a solid solution.
- **Option 2: Copper in Gold**: In this case, gold is the solvent (solid), and copper is the solute (which can also be solid). This qualifies as a solid solution.
- **Option 3: Camphor in Nitrogen**: Nitrogen is a gas, making this not a solid solution.
- **Option 4: Oxygen in Nitrogen**: Again, both oxygen and nitrogen are gases, so this does not qualify as a solid solution.

4. **Conclusion**: The only option that qualifies as a solid solution is **Copper in Gold**.

### Final Answer:
The example of a solid solution is **Copper in Gold**.