What are isotherms and isobars ?

What are isotopes and isobars ?

What are Isobars?

Compare isothermal and an adiabatic process .

An ideal gas undergoes four different processes from the same initial state. Four processes are adiabatic, isothermal, isobaric, andisochoric. Ot of 1,2,3 and 4 which one is adiabatic