A liquid can easily change its shape but a solid can not because

Options

A. the density of a liquid is smaller than that of a solid
B. the forces between the molecules is stronger in solid than in liquids
C. the atoms combine to form bigger molecules in a solid
D. the average sepration between the molecules is larger in solids.

Answer

To understand why a liquid can easily change its shape while a solid cannot, we can analyze the properties of solids and liquids in terms of molecular structure and intermolecular forces.

### Step-by-Step Solution:

1. **Understanding the State of Matter**:
- Solids have a definite shape and volume, while liquids have a definite volume but take the shape of their container.

2. **Molecular Arrangement**:
- In solids, molecules are tightly packed in a fixed arrangement. This close packing restricts the movement of the molecules, giving solids their rigid structure.
- In liquids, molecules are less tightly packed compared to solids and are free to move past one another. This allows liquids to flow and change shape.

3. **Intermolecular Forces**:
- The forces between molecules in solids (intermolecular forces) are much stronger than those in liquids. This is because the molecules in solids are held together by strong attractive forces, which keep them in fixed positions.
- In liquids, the intermolecular forces are weaker, allowing the molecules to slide over each other easily.

4. **Freedom of Movement**:
- The stronger the intermolecular forces, the less freedom the molecules have to move. In solids, the strong forces restrict molecular movement, preventing any change in shape.
- In contrast, the weaker forces in liquids allow for greater freedom of movement, enabling them to change shape easily.

5. **Conclusion**:
- Therefore, the correct reason why a liquid can easily change its shape while a solid cannot is that the forces between the molecules are stronger in solids than in liquids.

### Final Answer:
A liquid can easily change its shape but a solid cannot because **the forces between the molecules are stronger in solids than in liquids**.