Following is false when in a volatile solvent $\mathrm{A}$ and a non volatile solute $\mathrm{B}$ is mixed (where symbols have their usual meaning):

$0.2$ 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) 

Calculate molarity of final solution obtained by mixing I and II $\mathrm{HNO}$ solution.

$\begin{array}{ccc}& \mathrm{I}& \mathrm{II}\\ \%\frac{\mathrm{W}}{\mathrm{W}}& 12.6& 6.3\\ \mathrm{d}(\mathrm{in} \mathrm{g}/\mathrm{mL})& 1.5& 1\\ \mathrm{Volume} (\mathrm{in} \mathrm{L})& 5& 5\end{array}$

A solution containing $0.1 \mathrm{g}$ of a non volatile organic substance $\mathrm{P}$ (Molecular mass $100$ ) in $100 \mathrm{g}$ of benzene raises the boiling point of benzene by $0.2°\mathrm{C}$ while a solution containing $0.1 \mathrm{g}$ of another non-volatile substance $\mathrm{Q}$ in same amount of benzene raises the boiling point of benzene by $0.4°\mathrm{C}.$ If ratio of molecular masses of $\mathrm{P}$ and $\mathrm{Q}$ is $\frac{\mathrm{x}}{\mathrm{y}}$ then. Find minimum value of $\mathrm{x}+{\mathrm{y}}_{}.$