In thermodynamic processes which of the following statements is not true?

Let's evaluate each statement:Isochoric process: By definition, the volume remains constant ($V=\text{constant}$). Pressure varies according to Gay-Lussac's Law. Therefore, the statement "pressure remains constant" is false.Isothermal process: By definition, temperature remains constant ($T=\text{constant}$). This is true.Adiabatic process: The governing equation for an ideal gas is $P{V}^{\gamma }=\text{constant}$. This is true.Adiabatic process: It is a process where no heat is exchanged with the surroundings ($\Delta Q=0$), implying the system is thermally insulated. This is true.