A mass of gas is first expanded isothermally and then compressed adiabatically to its original volume. What further simplest operation must be performed on the gas to restore it to its original state?

A mass of gas is first expanded isothermally and then compressed adiab

1.	A mass of gas is first expanded isothermally and then compressed adiabatically to its original volume. What further simplest operation must be performed on the gas to restore it to its original state?
Answer» An ISOBARIC cooling to bring its temperature to initial value An isochoric cooling to bring its PRESSURE to its initial value An ISOTHERMAL PROCESS to take its pressure to its initial value An isochoric heating to bring its temperature to initial value Answer :B