Kinetic energy of molecules is highest in

Options

A. Gases
B. Liquids
C. Solids
D. Solution

Explanation

**Step-by-Step Solution:**

1. **Understanding Kinetic Energy**: Kinetic energy (KE) of a molecule is given by the formula:
\[ KE = \frac{1}{2} mv^2 \]
where \( m \) is the mass of the molecule and \( v \) is its velocity.

2. **Comparing States of Matter**: The three primary states of matter are solids, liquids, and gases. In these states, the arrangement and movement of molecules differ significantly:
- **Solids**: Molecules are closely packed and vibrate in fixed positions.
- **Liquids**: Molecules are less tightly packed than in solids and can move past one another, allowing for some fluidity.
- **Gases**: Molecules are far apart with significant intermolecular space, allowing them to move freely and rapidly.

3. **Intermolecular Distance**: In gases, the intermolecular distance is much greater compared to solids and liquids. This large space allows gas molecules to move with higher velocities.

4. **Velocity of Molecules**: Since gas molecules have higher velocities due to the large intermolecular distances, this directly affects their kinetic energy. The greater the velocity, the higher the kinetic energy.

5. **Conclusion**: Since kinetic energy is directly proportional to the square of the velocity, and gases have the highest velocities among the three states of matter, it follows that the kinetic energy of molecules is highest in gases.

**Final Answer**: The kinetic energy of molecules is highest in gases.

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