Question

In thermodynamic processes, which of the following statements is NOT true?

• A. In an isothermal process, the temperature remains constant.
• B. In an adiabatic process, the system is insulated from surroundings.
• C. In an isochoric process, pressure remains constant.
• D. In an adiabatic process, $PV^{\gamma}=$ constant.

Hint:

Isochoric = Constant Volume; Isobaric = Constant Pressure.

Answer 1

The Correct Option is C

Step 1: Concept
Define each thermodynamic process.

Step 2: Analysis
- Isothermal: $\Delta T = 0$ (True). - Adiabatic: $Q = 0$, insulated (True). - Isochoric: $\Delta V = 0$, Volume remains constant (Not Pressure). - Isobaric: $\Delta P = 0$, Pressure remains constant.

Step 3: Conclusion
Statement (C) is false because it describes an isobaric process, not isochoric. Final Answer: (C)