The crystal very soft in nature is

Options

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

Explanation

To determine which type of crystal is very soft in nature, we can analyze the properties of different types of crystals based on their bonding and structure.

### Step-by-Step Solution:

1. **Identify the Types of Crystals:**
- The question provides four options: ionic crystals, molecular crystals, covalent crystals, and metallic crystals.

2. **Analyze Ionic Crystals:**
- Ionic crystals are composed of positively and negatively charged ions.
- These ions are held together by strong electrostatic forces (ionic bonds).
- Due to these strong forces, ionic crystals are typically hard and brittle.

**Hint:** Ionic bonds are strong due to the attraction between oppositely charged ions.

3. **Analyze Molecular Crystals:**
- Molecular crystals consist of molecules that are held together by weaker forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds.
- Because these forces are relatively weak compared to ionic or covalent bonds, molecular crystals tend to be soft and have lower melting points.

**Hint:** Look for the type of forces holding the particles together; weaker forces lead to softer materials.

4. **Analyze Covalent Crystals:**
- Covalent crystals are formed by non-metal atoms that are bonded by strong covalent bonds.
- These bonds create a network structure that is very hard and has a high melting point.

**Hint:** Covalent bonds are strong and result in hard materials.

5. **Analyze Metallic Crystals:**
- Metallic crystals consist of positive metal ions surrounded by a sea of delocalized electrons.
- The metallic bonds provide strength and cohesion, making metallic crystals hard.

**Hint:** The presence of metallic bonding contributes to the hardness of these crystals.

6. **Conclusion:**
- After analyzing all the options, we find that molecular crystals are the only type that is very soft in nature due to the weak intermolecular forces holding the molecules together.
- Therefore, the correct answer is **molecular crystals**.

### Final Answer:
The crystal that is very soft in nature is **molecular crystal**.