For an ideal binary liquid solution with ${\mathrm{P}}_{\mathrm{A}}^{\mathrm{o}}>{\mathrm{P}}_{\mathrm{B}}^{\mathrm{o}}$ which relation between ${\mathrm{X}}_{\mathrm{A}}$ (mole fraction of A in liquid phase) and ${\mathrm{Y}}_{\mathrm{A}}$ (mole fraction of A in vapour phase) is correct, ${\mathrm{X}}_{\mathrm{B}}$ and ${\mathrm{Y}}_{\mathrm{B}}$ are mole fraction of B in liquid and vapour phase respectively

The vapour pressure of ideal solution of benzene and toluene is $550 \mathrm{torr}$ at $80°\mathrm{C}$ then what would be correct statement about same solution at $100°\mathrm{C}.$

$0.2$ moles of $\mathrm{A}$ and $0.3$ moles of $\mathrm{B}$ are taken in separate beakers and enclosed in chamber $\mathrm{I}.$ Another $0.2$ moles of $\mathrm{A}$ and $0.3$ moles of $\mathrm{B}$ are mixed in a beaker and enclosed in chamber$\mathrm{Il}.$ At equilibrium which of the following are not true. ($\mathrm{A}$ and $\mathrm{B}$ are volatile liquids and they form ideal solution on mixing)