Question

Some chemical reactions give off distinctive smells. Give one example

Answer 1

• When hydrogen gas is bubbled through molten sulfur, it forms Hydrogen sulfide gas$\left({\mathrm{H}}_2\mathrm{S}\right)$, which smells like rotten eggs.
• $\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Sulphur}}{\mathrm{S}\left(\mathrm{s}\right)}\to \underset{\mathrm{Sulphide}}{\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2\mathrm{S}\left(\mathrm{g}\right)}}$