As a pure substance, which of the following could experience dipole-dipole interactions? 1. CO, II. HCI II. CCI, A) I only B) II only C) III only D) Il and III only E) I, II, and II

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**Question 17 of 34**

As a pure substance, which of the following could experience dipole-dipole interactions?

I. CO₂  
II. HCl  
III. CCl₄  

A) I only  
B) II only  
C) III only  
D) II and III only  
E) I, II, and III  

**Explanation:**

Dipole-dipole interactions occur between polar molecules, where there is a significant difference in electronegativity between the atoms, leading to a permanent dipole moment. 

- **CO₂** is a linear molecule and nonpolar despite the polar bonds because the dipoles cancel out.
- **HCl** is a diatomic molecule with a significant electronegativity difference, making it polar and capable of dipole-dipole interactions.
- **CCl₄** is a tetrahedral molecule, overall nonpolar due to the symmetric arrangement of polar bonds.

Thus, only HCl (Option B) can experience dipole-dipole interactions.
Transcribed Image Text:**Question 17 of 34** As a pure substance, which of the following could experience dipole-dipole interactions? I. CO₂ II. HCl III. CCl₄ A) I only B) II only C) III only D) II and III only E) I, II, and III **Explanation:** Dipole-dipole interactions occur between polar molecules, where there is a significant difference in electronegativity between the atoms, leading to a permanent dipole moment. - **CO₂** is a linear molecule and nonpolar despite the polar bonds because the dipoles cancel out. - **HCl** is a diatomic molecule with a significant electronegativity difference, making it polar and capable of dipole-dipole interactions. - **CCl₄** is a tetrahedral molecule, overall nonpolar due to the symmetric arrangement of polar bonds. Thus, only HCl (Option B) can experience dipole-dipole interactions.
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