What is oxidation state of xenon in xenonmonooxytetrafluoride?

Calculate the mole fraction of pure liquid $B$ in solution if total vapour pressure of solution, vapour pressure of pure liquid A and vapour pressure of pure liquid B are 500 mm Hg , 400 mm Hg and 575 mm Hg respectively at given temperature.

What happens to the emf for the cell, ${ }^{-} \mathrm{Zn}_{(\mathrm{s})}\left|\mathrm{Zn}_{(1 \mathrm{M})}^{+2} \| \mathrm{Ag}^{+1}(1 \mathrm{M})\right| \mathrm{Ag}_{(\mathrm{s})}^{+}$if concentration of $\mathrm{Ag}^{+1}$ decreases to 0.1 M ?

The attractive interactions between cations and mobile electrons in metallic solid is called