Question

Identify the following substances which are underlined
An alkaline gas which produces dense white fumes when reacted with hydrogen chloride gas

Answer 1

1. An alkaline gas which produces dense white fumes when reacted with hydrogen chloride gas is Ammonia$\left({\mathrm{NH}}_3\right)$.
2. Ammonia on reacting with Hydrogen Chloride$\left(\mathrm{HCl}\right)$ forms dense white fumes of Ammonium Chloride$\left({\mathrm{NH}}_4\mathrm{Cl}\right)$
3. ${\mathrm{NH}}_{3_{\left(\mathrm{g}\right)}}+{\mathrm{HCl}}_{\left(\mathrm{g}\right)}\to {\mathrm{NH}}_4{\mathrm{Cl}}_{\left(\mathrm{g}\right)}$