Question

See the figure

The valves of $X$ and $Y$ are opened simultaneously. The white fumes of $N{H}_{4}Cl$ will first form at:

• A. $A$
• B. $B$
• C. $C$
• D. $A,B$ and $C$ simultaneously

Answer 1

The correct option is C $C$

As we know,

Rate of diffusion $\alpha$ $\frac{1}{\sqrt{Molarmass}}$

And molar mass of $N{H}_3=17$ and of $HCl=36.5$

So ammonia will diffuse faster and reach $C$ and react with $HCl$.

$N{H}_3+HCl\to N{H}_{4}Cl$

and white fumes form there first.