Consider one mole of a gas in a closed vessel fitted with a movable piston. At constant temperature $\left(\mathrm{T}\right)$, the pressure of the gas $\left(\mathrm{P}\right)$ is increased gradually and the volume $\left(\mathrm{V}\right)$ is noted. The resulting $P-V$ isotherm (not drawn to scale) is given below.

The correct plot (not drawn to scale) of the number of moles of the substance in gas phase $\left(n_{\mathrm{G}}\right)$ against $V$ or $P$ is:

For the given $\mathrm{pV}$ isotherms, which of the following is correct for ${\mathrm{T}}_1,{\mathrm{T}}_2,{\mathrm{T}}_3?$

Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures:

At constant pressure, the volume of a fixed mass of a gas varies as a function on temperature as shown in the graph

The volume of the gas at $300°\mathrm{C}$ is larger than that at $0°\mathrm{C}$ by a factor of