In general boiling point of covalent compounds is affect due to increasing molecular weight and hydrogen bonding. Thus it is obversed that the boiling point of octanol is greater that water while that of methanol is lesser than water. The other properties which are considerably affected due to hydrogen bond formation are acidic nature, melting point, anamalous behaviour of water below `4^(@)C`., It is therefore concluded that hydrogen bonding palys a vutal role in explaning many observable facts.
Q. Which of the following statements is true?

Options

A. The lattice structure of ice involves true covalent bond
B. The lattice structure of ice is the result of dipole-dipole interaction
C. The lattice structure of ice is the result of intra and inter-molecular hydrogen bond formation
D. The lattice structure of ice is only due to inter-molecular hydrogen bonding

Answer

To determine which statement is true regarding the properties of ice and hydrogen bonding, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Lattice Energy and Structure of Ice**:
- Lattice energy refers to the energy released when ions or molecules come together to form a solid lattice structure. In the case of ice, we need to consider how water molecules arrange themselves.

2. **Analyzing the Statements**:
- **Statement 1**: "The lattice energy of ice is due to covalent bonds."
- This statement is incorrect because the lattice energy of ice is not derived from covalent bonds; rather, it arises from intermolecular forces.

- **Statement 2**: "The lattice structure of ice is the result of dipole-dipole interaction."
- This statement is also incorrect. While water molecules do have dipole moments, the specific structure of ice is primarily due to hydrogen bonding, not just dipole-dipole interactions.

- **Statement 3**: "The lattice energy of ice is the result of intra and intermolecular hydrogen bonding."
- This statement is misleading. While hydrogen bonding does play a role, the lattice structure of ice is predominantly formed by intermolecular hydrogen bonding, not intramolecular.

- **Statement 4**: "The lattice structure of ice is only due to intermolecular hydrogen bonding."
- This statement is correct. The unique hexagonal structure of ice is formed by the intermolecular hydrogen bonds between water molecules, which create a cage-like structure.

3. **Conclusion**:
- After analyzing all the statements, we conclude that the correct statement is **Statement 4**: "The lattice structure of ice is only due to intermolecular hydrogen bonding."