Question

the promoter used in Bosch's process is

Answer 1

Subtances like aluminium oxide, potassium oxide are added to increase the efficiency of the catalyst. Hence they are called promoters

Answer 2

Bosch process may refer to: Deep reactive-ion etching#Bosch process, a microfabrication technique to form high aspect ratio features. Haber–Bosch process, ammonia production method in chemical industry. Boschreaction, forms elemental carbon from CO2 and hydrogen using a metallic catalyst.