If NaCl dissolves in water then the nature of interaction between them is

Options

A. Dipole-Dipole interaction
B. Dipole-Induced dipole interaction
C. Ion-dipole interaction
D. Hydrogen Bonding

Answer

To determine the nature of the interaction between NaCl and water when NaCl dissolves, we can analyze the process step by step.

### Step-by-Step Solution:

1. **Understanding NaCl Structure**:
- Sodium chloride (NaCl) is an ionic compound composed of Na⁺ (sodium ions) and Cl⁻ (chloride ions) held together by strong electrostatic forces known as ionic bonds.

2. **Dissolution Process**:
- When NaCl is added to water, the polar water molecules interact with the ionic lattice of NaCl. Water is a polar solvent, meaning it has a partial positive charge (due to hydrogen atoms) and a partial negative charge (due to the oxygen atom).

3. **Lattice Energy Consideration**:
- The dissolution of NaCl involves overcoming the lattice energy, which is the energy required to separate the Na⁺ and Cl⁻ ions from the solid lattice. In water, the energy released from the interaction between water molecules and the ions (hydration energy) compensates for the lattice energy.

4. **Ion-Dipole Interaction**:
- The positive end of the water molecule (hydrogen) is attracted to the negatively charged Cl⁻ ions, while the negative end of the water molecule (oxygen) is attracted to the positively charged Na⁺ ions. This interaction is known as an ion-dipole interaction.

5. **Hydration of Ions**:
- As NaCl dissolves, the Na⁺ and Cl⁻ ions become surrounded by water molecules. This process is called hydration, which stabilizes the ions in solution and allows them to disperse throughout the water.

6. **Conclusion**:
- The nature of the interaction between NaCl and water upon dissolution is primarily ion-dipole interactions, which lead to the hydration of the ions.

### Final Answer:
The nature of the interaction between NaCl and water when NaCl dissolves is ion-dipole interaction.

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