Question

What do you observe when hydrogen gas is passed through molten sulphur?

Answer 1

When hydrogen gas is passed through molten sulphur it reacts with sulphur and forms hydrogen sulphide, which has a rotten egg-like smell.

$\underset{\mathrm{Hydrogen}\mathrm{gas}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Molten}\mathrm{sulphur}}{\mathrm{S}\left(\mathrm{l}\right)}\stackrel{1300°\mathrm{C}}{\to }\underset{\stackrel{\mathrm{Rotten}\mathrm{egg}\mathrm{like}\mathrm{smell}}{\mathrm{Hydrogen}\mathrm{sulphide}}}{{\mathrm{H}}_2\mathrm{S}\left(\mathrm{g}\right)}$