Question

Select from the list of gas that matches the description given:

Ammonia, Ethane, Hydrogen chloride, Hydrogen sulphide, Ethyne.

This gas produces dense white fumes with Ammonia gas.

Answer 1

• When a rod dipped in Ammonia is brought near the Hydrogen chloride gas a white fumes of Ammonium chloride are observed.
• The reaction is shown below.
  $$\begin{gathered} {\mathrm{NH}}_3\left(g\right)+\mathrm{HCl}\left(g\right)\to {\mathrm{NH}}_4\mathrm{Cl}\left(s\right) \\ \mathrm{Ammonia}\mathrm{Hydrogen}\mathrm{Ammonium} \\ \mathrm{chloride}\mathrm{chloride} \end{gathered}$$.
• Therefore, Hydrogen chloride gas produces dense white fumes with Ammonia gas.