AP EAPCET 20-Aug-2021 Shift 2 Paper

According to given p−V diagram,
As we know that work is equal to area under p−V graph.∴WA>WB>WC>WD
and by using 1st law of thermodynamics,ΔQ=ΔU+ΔW
Here, internal energy, ΔU=0
∵ Initial and final positions are same.
∴ Heat (ΔQ) sequence will be
ΔQA>ΔQB>ΔQC>ΔQD
Hence, QA−QD=WA−WD