High boiling point of water is due to :

Options

A. Its high specific heat
B. Hydrogen bonding between the molecules
C. Weak dissociation of water molecules
D. Its high dielectric constant

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the reason behind the high boiling point of water. We need to analyze the options provided to find the correct explanation.

2. **Analyzing the Options**:
- **Option 1: High Specific Heat**: While water does have a high specific heat, this property relates to how much energy is required to raise the temperature of water, not directly to its boiling point.
- **Option 2: Hydrogen Bonding**: Water molecules are polar and can form hydrogen bonds with each other. This strong intermolecular force requires a significant amount of energy to overcome, thus contributing to the high boiling point.
- **Option 3: Weak Dissociation of Water Molecule**: The dissociation of water into ions (H⁺ and OH⁻) is not a primary factor affecting the boiling point.
- **Option 4: High Dielectric Constant**: While water has a high dielectric constant, this property is more related to its ability to dissolve ionic substances rather than its boiling point.

3. **Identifying the Correct Answer**: Based on the analysis, the strongest factor contributing to the high boiling point of water is the presence of hydrogen bonding between water molecules.

4. **Conclusion**: The correct answer is **Option 2: Hydrogen bonding between the molecules**.