The postulates of the kinetic molecular theory of gases include all those that follow except

Options

A. No forces exist between molecules
B. Molecules are point masses
C. Molecules are in random motion
D. Molecular collision is followed by loss of kinetic energy

Answer

To solve the question regarding the postulates of the kinetic molecular theory of gases, we will analyze each option provided and determine which one does not align with the theory.

### Step-by-Step Solution:

1. **Understanding the Kinetic Molecular Theory**:
The kinetic molecular theory of gases is based on several key postulates that describe the behavior of gas molecules. These include assumptions about the motion, interactions, and properties of gas molecules.

2. **Analyzing the Options**:
- **Option 1**: "No force exists between the molecules."
- This aligns with the kinetic molecular theory, which assumes that gas molecules do not exert forces on each other except during collisions.

- **Option 2**: "Molecules are point masses."
- This is also consistent with the theory, which treats gas molecules as point masses that occupy no volume.

- **Option 3**: "Molecules are in random motion."
- This is a fundamental postulate of the kinetic molecular theory, stating that gas molecules are in constant, random motion.

- **Option 4**: "Molecular collision is followed by loss of kinetic energy."
- This statement contradicts the kinetic molecular theory. According to the theory, collisions between gas molecules are perfectly elastic, meaning there is no loss of kinetic energy during these collisions.

3. **Identifying the Incorrect Option**:
- From the analysis, it is clear that Option 4 is the one that does not fit with the postulates of the kinetic molecular theory of gases.

### Conclusion:
The answer to the question is **Option 4**: "Molecular collision is followed by loss of kinetic energy."