A bottle of dry ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends. The white ammonium chloride ring first formed will be

Options

A. at the center of the tube
B. near the hydrogen chloride bottle
C. near the ammonia bottle
D. throughout the length of the tube

Answer

B

Explanation

According to Graham's law of diffusion , under identical conditions of `T` and `p` , the rates of diffusion for gaseous substances are inversely proportional to the squares roots their molar masses :
`r prop (1)/(sqrt(M))`
Because of higher molar mass , `HCl` diffuses at a slower rate than `NH_(3)` is more than that of `HCl` in a given time.