Assertion Any straight line on V-T diagram represents iisobaric process.
Reason In isobaric process, if V is doubled, then T will also become two times.

Options

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

Explanation

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

### Step 1: Understand the Assertion
The assertion states that "Any straight line on the V-T (Volume-Temperature) diagram represents an isobaric process."

- In an isobaric process, the pressure (P) remains constant. According to the ideal gas law (PV = nRT), if pressure is constant, we can express volume (V) as a function of temperature (T):

\[ V = \frac{nR}{P} T \]

- This equation shows that volume is directly proportional to temperature when pressure is constant. Therefore, if we plot volume (V) on the x-axis and temperature (T) on the y-axis, the graph will be a straight line passing through the origin.

### Step 2: Analyze the Reason
The reason states that "In an isobaric process, if V is doubled, then T will also become two times."

- From the relationship derived above, since \( V \propto T \) in an isobaric process, if the volume is doubled, the temperature must also double to maintain the proportional relationship. This statement is true.

### Step 3: Conclusion
- The assertion is false because not every straight line on the V-T diagram represents an isobaric process; only the straight lines that pass through the origin do.
- The reason is true as it correctly describes the relationship between volume and temperature in an isobaric process.

### Final Answer
- Assertion: False
- Reason: True

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

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