The ratio of work done by an ideal rigid diatomic gas to the heat supplied to the gas in an isobaric process is (in $/7$)

$A$ cyclic process is shown in the figure. The work done during the isobaric expansion is ...... $J$.

Two containers $A$ and $B$ with pistons contain a diatomic gas at $300\, K$. The piston in container $A$ is free to move,while the piston in container $B$ is fixed. Both containers are supplied with the same amount of heat. If the temperature in container $A$ increases by $30\, K$,by how many $K$ will the temperature in container $B$ increase? Both containers contain the same gas.

$A$ diatomic gas $(\gamma = 1.4)$ does $200 \,J$ of work when it is expanded isobarically. The heat given to the gas in the process is: (in $\,J$)

In a given process for an ideal gas,$dW = 0$ and $dQ < 0$. Then for the gas:

Which of the following graphs between pressure $(P)$ and volume $(V)$ correctly shows isochoric changes?