For an adiabatic process graph between $PV$ and $V$ for a monatomic gas is

One mole of an ideal gas is kept enclosed under a light piston (area $={10}^{-2} {\mathrm{m}}^2$) connected by a compressed spring (spring constant $100 \mathrm{N} {\mathrm{m}}^{-1}$). The volume of gas is $0.83 {\mathrm{m}}^3$ and its temperature is $100 \mathrm{K}$. The gas is heated so that it compresses the spring further by $0.1 \mathrm{m}$. The work done by the gas in the process is (Take $R=8.3 \mathrm{J} {\mathrm{K}}^{-1} {\mathrm{mole}}^{-1}$ and suppose there is no atmosphere).

Heat energy absorbed by a system in going through a cyclic process is shown in the figure [$V$ in litres and $p$ in $kPa$] is 

One mole of an ideal gas is taken from state $A$ to state $B$ by three different processes, (a) $ACB$ (b) $ADB$ (c) $AEB$ as shown in the $P$-$V$ diagram. The heat absorbed by the gas is

$P$-$T$ diagram is shown below then choose the corresponding $V$-$T$ diagram.

A thermodynamic process of one mole ideal monoatomic gas is shown in figure. The efficiency of cyclic process $ABCA$ will be

An ideal gas undergoes a thermodynamic cycle as shown in figure.

Which of the following graphs may represent the same cycle?