Let's analyze each option:
- Isobaric means constant pressure. This is a correct pair.
- Isochoric means constant volume. This is a correct pair.
- Isothermal means constant temperature. This is a correct pair.
- Adiabatic means no heat exchange. This is the incorrect pair because in an adiabatic process, no heat is exchanged, not involves heat exchange.
Thus, the incorrect pair is \( \text{D} \).