Question

In thermodynamic processes, which one of the following statements is 'NOT' correct ?

• A. In an isothermal process, temperature remains constant.
• B. In an adiabatic process, \(Pv^{\gamma }=\) constant.
• C. In an isochoric process, pressure remains constant.
• D. In an adiabatic process, there is no exchange of heat with the surroundings.

Hint:

Match each process name to its constant quantity: isochoric means constant volume.

Answer 1

The Correct Option is C

Step 1: Elimination approach
Statements (A), (B) and (D) are the standard definitions and relations, so they are true.

Step 2: Find the odd one
In an isochoric process the volume is constant, not the pressure.

Step 3: Select
Option (C) is the NOT correct statement.

Final Answer:
Option (C) is the incorrect statement. \[ \boxed{\text{(C) }\text{In an isochoric process, pressure remains constant.}} \]