Dipole-induced dipole interaction are present in which of the following pairs

Options

A. `H_(2)O` and alcohol
B. `Cl_(2) and C Cl_(4)`
C. HCl and He atoms
D. `SiF_(4)` and He atoms

Explanation

To solve the question regarding dipole-induced dipole interactions present in the given pairs, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Dipole-Induced Dipole Interaction**:
- Dipole-induced dipole interactions occur when a polar molecule induces a dipole in a non-polar molecule or atom. This happens because the electric field of the polar molecule disturbs the electron cloud of the non-polar species, creating a temporary dipole.

2. **Analyzing the Options**:
- We have four pairs to analyze:
1. Water and Alcohol
2. Protein and CCl4
3. HCl and Helium atoms
4. SiF4 and Helium atoms

3. **Option 1: Water and Alcohol**:
- Both water (H2O) and alcohol (like methanol, CH3OH) are polar molecules. Since both are polar, they cannot exhibit dipole-induced dipole interactions.
- **Conclusion**: This option does not have dipole-induced dipole interactions.

4. **Option 2: Protein and CCl4**:
- Proteins are large biomolecules that can have polar regions, but CCl4 (carbon tetrachloride) is a non-polar molecule. However, since the protein is predominantly polar, this pair does not fit the criteria for dipole-induced dipole interactions, as both components do not interact in the required manner.
- **Conclusion**: This option does not have dipole-induced dipole interactions.

5. **Option 3: HCl and Helium atoms**:
- HCl is a polar molecule, with a dipole moment due to the electronegativity difference between hydrogen and chlorine. Helium, being a noble gas, is non-polar. In this case, HCl can induce a dipole in the helium atom, making this pair exhibit dipole-induced dipole interactions.
- **Conclusion**: This option has dipole-induced dipole interactions.

6. **Option 4: SiF4 and Helium atoms**:
- SiF4 (silicon tetrafluoride) is a symmetrical molecule, which makes it non-polar. Helium is also non-polar. Since both are non-polar, they cannot exhibit dipole-induced dipole interactions.
- **Conclusion**: This option does not have dipole-induced dipole interactions.

### Final Answer:
The only pair that exhibits dipole-induced dipole interactions is **HCl and Helium atoms**.