Iodine crystals are placed in which category among the following

Options

A. lonic crystal
B. Metallic crystal
C. Molecular crystal
D. Covalent crystal

Answer

To determine the category in which iodine crystals are placed, we will analyze the characteristics of different types of crystals and see where iodine fits best.

### Step-by-Step Solution:

1. **Understanding Ionic Crystals**:
- Ionic crystals are made up of positive and negative ions. These ions are held together by strong electrostatic forces (ionic bonds).
- Example: Sodium chloride (NaCl).
- **Conclusion**: Iodine does not consist of ions; therefore, it is not an ionic crystal.

2. **Understanding Metallic Crystals**:
- Metallic crystals consist of positive metal ions surrounded by a sea of delocalized electrons. The bonding in metallic crystals is due to metallic bonding.
- Example: Copper (Cu).
- **Conclusion**: Iodine does not have a metallic structure; hence, it is not a metallic crystal.

3. **Understanding Molecular Crystals**:
- Molecular crystals are composed of molecules held together by intermolecular forces, primarily van der Waals forces.
- Example: Ice (solid water) and iodine (I2) are molecular crystals.
- **Conclusion**: Iodine crystals are indeed molecular crystals.

4. **Understanding Covalent Crystals**:
- Covalent crystals consist of atoms connected by a continuous network of covalent bonds, forming a solid structure.
- Example: Diamond and graphite.
- **Conclusion**: Iodine does not have a covalent structure; therefore, it is not a covalent crystal.

### Final Answer:
Based on the analysis, iodine crystals are classified as **molecular crystals**.