| Organically polluted water may have alkalinity derived from the salts of organic weak acids like acetic acids, propionic acids and hydrosulphuric acid. |
| The hydrosulphuric zone of Black sea is uninhabited. |
| It dissolves in hot hydrochloric acid, evolving hydrosulphuric acid, and producing a solution of trichloride of antimony. |
| Write equations for the complete combustion of hydrosulphuric acid, methane, and arsine. |
| Depth of the top border of hydrosulphuric infection of Black sea is non-uniform. |
| The sulphur is turned into pellets and shipped to the nearest market to make hydrosulphuric acid, fertiliser or other valuable products. |
