The valves X and Y are opened simultaneously. The white fumes of NH4Cl will first form at :

                   

(A) A                                                 

(B) B

(C) C                                                 

(D) A, B and C simultaneously

Concept Videos :-

#6 | Graham's Law of Diffusion

Concept Questions :-

Graham's Law

(C).  Since rate of diffusion of NH3 is more then HCl due to its comparatively lower mol. wt.,

        therefore, fumes of NH4Cl will be formed at C.

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