Which of the following forces is present between polar and non-polar molecule ?

Options

A. dipole - dipole forces
B. hydrogen bonds
C. dipole - induced dipole forces
D. dispersion forces.

Answer

To solve the question regarding the forces present between polar and non-polar molecules, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Molecules**:
- **Polar Molecules**: These molecules have a significant difference in electronegativity between the atoms, resulting in a dipole moment (partial positive and negative charges).
- **Non-Polar Molecules**: These molecules have an even distribution of electron density, meaning they do not have a dipole moment.

2. **Identify the Intermolecular Forces**:
- Intermolecular forces are the forces that occur between molecules. The main types include:
- **Dipole-Dipole Forces**: Occur between two polar molecules.
- **London Dispersion Forces**: Present between all molecules, but are the only forces in non-polar molecules.
- **Dipole-Induced Dipole Forces**: Occur when a polar molecule induces a dipole in a non-polar molecule.

3. **Focus on the Interaction Between Polar and Non-Polar Molecules**:
- When a polar molecule approaches a non-polar molecule, the electric field created by the polar molecule can distort the electron cloud of the non-polar molecule, inducing a temporary dipole in it. This interaction is known as **Dipole-Induced Dipole Forces**.

4. **Conclusion**:
- Therefore, the force that is present between a polar molecule and a non-polar molecule is the **Dipole-Induced Dipole Force**.

### Final Answer:
The force present between polar and non-polar molecules is **Dipole-Induced Dipole Force**.

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