Question:
In thermodynamic processes, which one of the following statements is 'NOT' correct ?
In thermodynamic processes, which one of the following statements is 'NOT' correct ?
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Match each process name to its constant quantity: isochoric means constant volume.
Updated On: Nov 12, 2026
- In an isothermal process, temperature remains constant.
- In an adiabatic process, \(Pv^{\gamma }=\) constant.
- In an isochoric process, pressure remains constant.
- In an adiabatic process, there is no exchange of heat with the surroundings.
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Isothermal means constant temperature, adiabatic means no heat exchange, isochoric means constant volume and isobaric means constant pressure.
Step 2: Check each statement
(A) Isothermal: temperature constant, correct.
(B) Adiabatic: \(PV^{\gamma}=\) constant, correct.
(D) Adiabatic: no heat exchange, correct.
Step 3: The incorrect one
(C) says pressure is constant in an isochoric process. Constant pressure belongs to an isobaric process, so this is not correct.
Final Answer:
The statement that pressure remains constant in an isochoric process is not correct. \[ \boxed{\text{(C) }\text{In an isochoric process, pressure remains constant.}} \]
Isothermal means constant temperature, adiabatic means no heat exchange, isochoric means constant volume and isobaric means constant pressure.
Step 2: Check each statement
(A) Isothermal: temperature constant, correct.
(B) Adiabatic: \(PV^{\gamma}=\) constant, correct.
(D) Adiabatic: no heat exchange, correct.
Step 3: The incorrect one
(C) says pressure is constant in an isochoric process. Constant pressure belongs to an isobaric process, so this is not correct.
Final Answer:
The statement that pressure remains constant in an isochoric process is not correct. \[ \boxed{\text{(C) }\text{In an isochoric process, pressure remains constant.}} \]
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