MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryGaseous statePrevious Year Questions
When a bottle of dry ammonia and a bottle of dry HCl connected through a long tube are opened simultaneously at both ends, at first (Kerala CEE 2008)
A.a white ring is formed at the centre of the tube
B.a white ring is formed near the ammonia bottle
C.entire length of tube turns white
D.a white ring is formed near HCl bottle✓ Correct
Explanation
According to Graham's law of diffusion, 1/ r M Molecular weight of HCl = 1 + 35.5 = 36.5 g/mol Molecular weight of NH3 = 14 + 3 = 17 g/mol As, the molecular weight of dry ammonia is less, so it diffuses rapidly and forms a ring near HCl bottle at first.