Question

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

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

Answer 1

Answer: (B)

near the hydrogen chloride bottle

Answer 2

HCl will diffuse at slower rate than ammonia because rate of effusion$?\frac{1}{\sqrt{M}}$
Therefore, ammonia will travel more distance than HCl in the same time interval and the two gas will first meet nearer to HCl end