Assertion :- `Q_("Surr")` is zero for adiabatic process
Reason :- Final state of the system remains unchanged in adiabatic process.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are false.

Answer

To solve the question, we need to analyze the assertion and the reason provided regarding the adiabatic process.

### Step 1: Understand the Assertion
The assertion states that \( Q_{\text{surr}} \) (the heat exchanged with the surroundings) is zero for an adiabatic process.

**Explanation:**
In thermodynamics, an adiabatic process is defined as one in which no heat is transferred to or from the system. Therefore, the heat exchange with the surroundings, \( Q_{\text{surr}} \), is indeed zero.

### Step 2: Understand the Reason
The reason states that the final state of the system remains unchanged in an adiabatic process.

**Explanation:**
This statement is incorrect. While an adiabatic process does not involve heat exchange, it does not imply that the initial and final states of the system are the same. The system can undergo changes in temperature, pressure, and volume during an adiabatic process. The only condition is that no heat is exchanged with the surroundings.

### Step 3: Conclusion
Based on the analysis:
- The assertion is true: \( Q_{\text{surr}} = 0 \) for an adiabatic process.
- The reason is false: The final state of the system does not necessarily remain unchanged in an adiabatic process.

Thus, the correct answer is that the assertion is true, but the reason is false.

### Final Answer
Assertion is true, Reason is false.