Question:
Directions : Question number 1,2 and 3 are based on the following paragraph. Two moles of helium gas are taken over the cycle $\mathrm{ABCDA}$, as shown in the $\mathrm{P}-\mathrm{T}$ diagram.
The work done on the gas in taking it from $\mathrm{D}$ to $\mathrm{A}$ is :-
Correct Option: , 4
Solution:
