Question

5 moles of a gas is allowed to pass through a series of changes as shown in the graph, in a cyclic process.
The processes \(C \rightarrow A\), \(B \rightarrow C\), and \(A \rightarrow B\) respectively are: \[ \text{(Volume = vertical axis, Temperature = horizontal axis)} \]

• A. Isothermal, Isochoric, Isobaric
• B. Isochoric, Isobaric, Isothermal
• C. Isobaric, Isochoric, Isothermal
• D. Isothermal, Isobaric, Isochoric

Hint:

Always identify the nature of the graph:
Vertical line Isothermal (T constant)
Horizontal line Isobaric (P constant)
Straight vertical or horizontal change Isochoric or Isothermal depending on which axis is constant.

Answer 1

The Correct Option is D

Step 1: Analyze segment \(C \rightarrow A\)
In this path, the curve is vertical, meaning temperature is constant while volume changes.
Hence, the process is Isothermal. Step 2: Analyze segment \(A \rightarrow B\)
Here, volume increases but temperature remains constant (horizontal line),
which is a characteristic of an Isobaric process. Step 3: Analyze segment \(B \rightarrow C\)
This segment shows a straight line with constant volume, while temperature decreases.
Therefore, the process is Isochoric. Step 4: Conclusion
The sequence of processes is: Isothermal (CA), Isobaric (AB), Isochoric (BC).