Which of the following compound are coloured?

Options

A. `PbCl_(2)`
B. `PbI_(2)`
C. `AgCl`
D. `AgI`

Answer

To determine which of the given compounds are colored, we will analyze each compound one by one based on their known properties.

### Step-by-Step Solution:

1. **Identify the Compounds**: The compounds given are:
- Lead(II) chloride (PbCl2)
- Lead(II) iodide (PbI2)
- Silver chloride (AgCl)
- Silver iodide (AgI)

2. **Analyze Lead(II) Chloride (PbCl2)**:
- Lead(II) chloride is known to be a white or colorless compound.
- **Conclusion**: Lead(II) chloride is colorless.

3. **Analyze Lead(II) Iodide (PbI2)**:
- Lead(II) iodide is known to have a yellow color.
- **Conclusion**: Lead(II) iodide is colored.

4. **Analyze Silver Chloride (AgCl)**:
- Silver chloride is also known to be a white precipitate and is considered colorless.
- **Conclusion**: Silver chloride is colorless.

5. **Analyze Silver Iodide (AgI)**:
- Silver iodide is known to be yellow in color.
- **Conclusion**: Silver iodide is colored.

6. **Summarize the Findings**:
- Colorless Compounds:
- Lead(II) chloride (PbCl2)
- Silver chloride (AgCl)
- Colored Compounds:
- Lead(II) iodide (PbI2)
- Silver iodide (AgI)

7. **Final Answer**:
- The colored compounds from the given list are Lead(II) iodide (PbI2) and Silver iodide (AgI).