Question

Select the correct word from the list given in the bracket for each of the following statements.

Hydrogen sulphide bubbled through nitric acid leads to precipitation of _________.

Answer 1

1. Hydrogen sulphide bubbled through nitric acid leads to precipitation of _Sulphur__.
2. Nitric acid ${\mathbf{\text{(HNO}}}_{\mathbf{3}}\mathbf{)}$ is a strong oxidizing agent, and Hydrogen sulphide $\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}\mathbf{S}\mathbf{\right)}$ is a non-metal hydride of Sulphur.
3. When Nitric acid ${\mathbf{\text{(HNO}}}_{\mathbf{3}}\mathbf{)}$ reacts with Hydrogen sulphide $\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}\mathbf{S}\mathbf{\right)}$ then it produces Nitrogen dioxide $\mathbf{\left(}{\mathbf{NO}}_{\mathbf{2}}\mathbf{\right)}$ and Sulphur $\mathbf{\left(}\mathbf{S}\mathbf{\right)}$.
4. The chemical reaction is as follows:
   $\underset{(\mathrm{Nitric}\mathrm{acid})}{2{\mathrm{HNO}}_3\left(\mathrm{l}\right)}+\underset{(\mathrm{Hydrogen}\mathrm{sulphide})}{2{\mathrm{H}}_2\mathrm{S}\left(\mathrm{g}\right)}\to \underset{(\mathrm{Nitrogen}\mathrm{dioxide})}{2{\mathrm{NO}}_2\left(\mathrm{g}\right)}+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+\mathrm{S}\left(\mathrm{s}\right)$
5. Precipitates of Sulphur $\mathbf{\left(}\mathbf{S}\mathbf{\right)}$ are formed in this reaction and appears yellow in colour.
6. Therefore, precipitate of Sulphur is formed when Hydrogen sulphide is bubbled through Nitric acid.