Q$1$ Ammonia is being abscrbed from Ammonia$($A$)-$air $($B$)$ mixture in sulphuric acid. The concentration of ammonia in the air $10mm$ from the acid surface is $40\%$ by volume and that ac the acid surface is negligible. The total pressure in the system is $400mmHg$ and the temperature is $300K.$ Calculate $($a$)$ the rate of absorption of ammonia across $0\mathrm{.}1m^2$ gas liquid contact area, $($b$)$ the partial pressure gradient of ammonia at $4mm$ from the acid surface, and $($c$)$ the rate of mass transfer of ammonia by molecular transport and that by bulk flow at two ends of the film.