Boyle's law is applicable for an:
1. adiabatic process.
2. isothermal process.
3. isobaric process.
4. isochoric process.

(2) Hint: Use the concept of Boyle's law.
Step 1: Write down Boyle's law.
Boyle’s law is applicable when the temperature is constant
i.e.,                             PV =nRT =constant
                               PV =constant(at constant temperature)
i.e.,                              P1V                    [where , P=pressure, V = volume]
So, this process can be called as an isothermal process.