Work in isothermal and adiabatic processes - Carnot cycle

2026 Re-NEET 1 question

1. Consider the reversible processes for 1.0 mol of an ideal gas as shown in the figure. $w_1$, $w_2$, $w_3$ and $w_4$ represent work done (in calories) in the processes 1, 2, 3 and 4, respectively; $\Delta U_2$ and $\Delta U_4$ are changes in the internal energy for the processes 2 and 4, respectively. [use R = 2 cal K$^{-1}$ mol$^{-1}$] The correct option is