1.

NH_(3) and HCl gas are introduced simultaneously from the two ends of a long tube. A white ring of NH_(3)Cl appears first

Answer»

A) nearer to the HCL end
B) at the centre of the tube
C) throughout the tube
D) nearer to the `NH_(3)` end

Solution :According to Graham.s law of diffusion
`(r_(1))/(r_(2))=SQRT((d_(2))/(d_(1)))=sqrt((m_(2))/(m_(1))),(r_(NH_(3)))/(r_(HCl))=sqrt((36.7)/(17))`
HENCE rate of diffusion of `NH_(3)` is more than HCl. This means `NH_(3)` reach first to HCl end. hence white ring of `NH_(4)Cl` appears first at HCl end.


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