A bottle of dry ammonia () and a bottle of dry hydrogen chloride () connected through a long uniform glass tube are opened simultaneously at both ends. Where will the white ammonium chloride () ring f

Question

A bottle of dry ammonia ($NH_3$) and a bottle of dry hydrogen chloride ($HCl$) connected through a long uniform glass tube are opened simultaneously at both ends. Where will the white ammonium chloride ($NH_4Cl$) ring first be formed?

Prashant Kotian · Accepted Answer

Correct answer: B. According to Graham's Law, lighter gases diffuse faster (). The molar mass of () is less than (). Therefore, travels faster and further down the tube in the same time, making the gases meet closer to the slower-moving source.

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