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 centre of the tube.
B. near the hydrogen chloride b0ttle.
C. near the ammonia bottle.
D. throughout the length of the tube

Answer

B

Explanation

Rate of diffusion `propsqrt(1/("Molecular mass"))`
`because` Molecular mass of HCI > Mole,cular mass of `NH_(3)`
`therefore` HCl diffuses at slower rate and white ammonium chloride is first formed near HCl bottle.