$p _{ i }= x _{ i } \times P _{ T }$
$P _{ i }=$ partial pressure of the $i ^{\text {th }}$ component
$x _{ i }=$ mole fraction of the $i ^{\text {th }}$ component
$p _{ T }=$ total pressure of mixture
$\Rightarrow 2 atm =\left(\frac{ n _{ H _{2}}}{ n _{ H _{2}}+ n _{ H _{ e }}+ n _{ O _{2}}}\right) \times p _{ T }$
$\Rightarrow p _{ T }=2 atm \times \frac{3}{1}=6 atm$
[ આપેલ : પાણીનો મોલલ ઉત્કલનબિંદુ ઉન્નયન અચળાંક $\left(\mathrm{K}_{\mathrm{b}}\right)=0.52 \mathrm{~K} . \mathrm{kg} \mathrm{mol}^{-1}$,
$1 \mathrm{~atm}$ દબાણ $=760 \mathrm{~mm} \mathrm{Hg}$, પાણીનું મોલર દળ $\left.=18 \mathrm{~g} \mathrm{~mol}^{-1}\right]$