1.

The figure shows the `P-V` plot of an ideal gas taken through a cycle `ABCDA`. The part `ABC` is a semi-circle and `CDA` is half of an ellipseThen A. The process during the path `ArarrB` is isthermalB. Heat flows out of the gas during then path `BrarrCrarrD`C. Work done during the path `ArarrBrarrC` is zeroD. Positive work is done by the gas in cycle `ABCDA`

Answer» Correct Answer - B::D
Temperature at `Bgt` temperature at D
`:. Delta U` is inegative (for `B rarr C rarr D`)
Also `W` is negative (for `B rarr C rarr D`)
Tracing is clockwise on `PV` diagram.
`:.` Total `W` is positive `:. (B) and(D)` are Correct


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