JAMB - Chemistry (2025 - No. 72)
The process employed in the industrial preparation of tetraoxosulphate(VI) acid is
Contact
Bosch
Frasch
Haber
Giải thích
The Contact Process is the main industrial method for making concentrated sulphuric acid (H\(_2\)SO\(_4\)), involving three steps: burning sulphur to get sulphur dioxide (SO\(_2\)), catalytically oxidizing SO\(_2\) with oxygen to form sulphur trioxide (SO\(_3\)) using a vanadium(V) oxide catalyst, and then absorbing SO\(_3\) into concentrated sulphuric acid to create oleum, which is finally diluted to the desired strength.
The Bosch process is primarily used for the industrial-scale production of hydrogen gas, (H\(_2\)).
The Frasch process is used for producing sulphur.
The Haber process (or Haber-Bosch process) is used to produce ammonia (NH\(_3\)).