How graphs are made for different processes like isothermal, isobaric, isochoric & adiabatic?
Hope you are talking about the PV diagrams.
The difference between isothermal and adiabatic curve is that the adiabatic curve is more steeper than an the isothermal curve.
In isobaric, P remains constant and hence will give a horizontal line (if P is takn along Y axis)
Isochoric, should give a vertical line if V is taken along X axis