Isotherms of carbon dioxide at various temperatures are represented in the figure. Answer the following question based on this figure. Will condensation take place when the temperature is ${\mathrm{T}}_3$. 

Isotherms of carbon dioxide at various temperatures are represented in the figure. Answer the following question based on this figure. What portion of the isotherm at ${\mathrm{T}}_1$ represent liquid and gaseous ${\mathrm{CO}}_2$ at equilibrium?

The variation of vapour pressure of different liquids with temperature is shown in the figure. Calculate graphically boiling points of liquids $\mathrm{A}$ and $\mathrm{B}$.

Tile variation of vapour pressure of different liquids with temperature is shown in the figure. If we take liquid C In a closed vessel and heat It continuously. At what temperature will it boil?

The variation of vapour pressure of different liquids with temperature is shown in the figure. At high altitude, atmospheric pressure is low (say $60 \mathrm{mm} \mathrm{Hg}$). At what temperature liquid $\mathrm{D}$ boils?     

The variation of vapour pressure of different liquids with temperature is shown in the figure. Pressure cooker is used for cooking food at hill station. Explain in terms of vapour pressure why is it so?