Question:
Which of the following graphs between pressure and volume of a gas correctly shows isochoric process in thermodynamics?
Which of the following graphs between pressure and volume of a gas correctly shows isochoric process in thermodynamics?
Show Hint
Isochoric means constant volume.
Updated On: Oct 1, 2026
- (D)
- (A)
- (C)
- (B)
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
An isochoric process takes place at constant volume. On a \(P\)-\(V\) diagram the volume stays fixed while the pressure changes.
Step 2: Key Formula or Approach:
A fixed value of \(V\) with \(P\) varying is a vertical straight line on a graph with \(V\) on the horizontal axis.
Step 3: Detailed Explanation:
In the figure, graph (A) is a sloping straight line, (B) is a vertical line, (C) is a curve rising to a plateau and (D) is a horizontal line.
Graph (D) is constant pressure, which is isobaric. Graph (B), the vertical line, shows \(V\) fixed, so it is isochoric.
In the option list, option D refers to graph (B).
Final Answer:
The isochoric process is the vertical line, graph (B), which is option (D). \[ \boxed{\text{Graph (B)}} \]
An isochoric process takes place at constant volume. On a \(P\)-\(V\) diagram the volume stays fixed while the pressure changes.
Step 2: Key Formula or Approach:
A fixed value of \(V\) with \(P\) varying is a vertical straight line on a graph with \(V\) on the horizontal axis.
Step 3: Detailed Explanation:
In the figure, graph (A) is a sloping straight line, (B) is a vertical line, (C) is a curve rising to a plateau and (D) is a horizontal line.
Graph (D) is constant pressure, which is isobaric. Graph (B), the vertical line, shows \(V\) fixed, so it is isochoric.
In the option list, option D refers to graph (B).
Final Answer:
The isochoric process is the vertical line, graph (B), which is option (D). \[ \boxed{\text{Graph (B)}} \]
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