Assertion : Good conductors of electricity are also good conductors of heat due to large number of free electrons.
Reason : It is easy to conduct heat from free electrons.

Options

A. If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.
B. If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
C. If Assertion is true, but the Reason is false.
D. If Assertion is false but the Reason is true.

Answer

To solve the question, we need to analyze both the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states: "Good conductors of electricity are also good conductors of heat due to a large number of free electrons."

- **Explanation**: Good conductors of electricity, such as metals, have a high density of free electrons. These free electrons can move easily through the material, allowing electric current to flow. The same property that allows them to conduct electricity also enables them to conduct heat efficiently.

### Step 2: Understand the Reason
The reason states: "It is easy to conduct heat from free electrons."

- **Explanation**: Free electrons in a conductor can transfer kinetic energy when they collide with other particles (atoms or molecules) in the material. As the temperature of the conductor increases, the motion of these electrons becomes more vigorous, leading to more frequent collisions with the lattice structure of the material. This results in efficient heat transfer.

### Step 3: Analyze the Relationship
Now, we need to determine if the reason provided is a good explanation for the assertion.

- **Analysis**: The reason explains how free electrons facilitate the conduction of heat. Since the assertion is about the relationship between electrical conductivity and thermal conductivity due to free electrons, the reason supports the assertion well.

### Conclusion
Both the assertion and the reason are true, and the reason provides a valid explanation for the assertion.

### Final Answer
Both assertion and reason are true, and the reason is a correct explanation of the assertion.