A sample of gas expands from volume V1 to V2. The amount of work done by the gas is greatest, when the expansion is(a) Adiabatic(b) Isobaric(c) Isothermal(d) Equal in all cases

(b)

In thermodynamics for same change in volume, the work done is maximum in isobaric process because in P - V graph, area enclosed by curve and volume axis is maximum in isobaric process.

So, the choice (b) is correct.