A bottle of `NH_(3)` gas and a bottle of dry HCl gas are connected through a long tube. The tube is opened simultaneously at both the ends. White fume of `NH_(4)Cl` is formed ……………..

Options

A. throughout the length of the tube
B. near HCl bottle
C. near `NH_(3)` bottle
D. at the centre of tube

Answer

B

Explanation

Atomic pressure in `NH_(3)` gas = 17 gm `mol^(-1)=M_(1)`
Atomic pressure in HCl gas = 36.5 gm `mol^(-1)=M_(2)`
According to Grapham.s gas diffusional Law, Whose atomic pressure is high its diffusion is slow. `(r=(1)/(sqrt(M)))`
The atomic pressure of HCl (36.5 gm `"mole"^(-1)`) is more then the atomic pressure of `NH_(3)` (17.0 gm `"mole"^(-1)`) So, the diffusion of HCl is less.
`therefore` The diffusion of HCl is very less.
`therefore` So, the fume of `NH_(4)Cl` is formed `NH_(3)` bottle.