The violet crystalline solid is

Options

A. Ammonium chloride
B. Iodine
C. Copper Sulphate
D. Zinc Carbonate

Answer

To identify the violet crystalline solid from the options given, we can analyze each option based on their properties and characteristics.

### Step-by-Step Solution:

1. **Examine the Options:**
- The options provided are ammonium chloride, copper sulfate, iodine, and zinc carbonate.

2. **Identify the Characteristics of Each Compound:**
- **Ammonium Chloride (NH4Cl):** This compound is typically white and crystalline, not violet.
- **Copper Sulfate (CuSO4):** This compound is usually blue in its pentahydrate form (CuSO4·5H2O) and does not appear violet.
- **Iodine (I2):** Iodine is known to exist as a lustrous purplish non-metallic solid at standard conditions and is recognized for its violet color.
- **Zinc Carbonate (ZnCO3):** This compound is generally white and does not exhibit a violet color.

3. **Determine the Correct Answer:**
- Based on the characteristics analyzed, iodine is the only compound that is described as a violet crystalline solid.

4. **Conclusion:**
- Therefore, the violet crystalline solid is **iodine**.