Mixture of catalysts Cr2O3 + Al2O3 + SiO2 prepared from Cr2O3 + Al2O3 + SiO2 at 500°C are used when benzene is produced from:

Explanation

The mixture of catalysts Cr2O3 + Al2O3 + SiO2 is used when benzene is produced from acetylene at elevated temperatures (500°C).The mixture of catalysts Cr2O3 (chromium oxide), Al2O3 (aluminum oxide), and SiO2 (silicon dioxide) plays a crucial role in the production of benzene from acetylene at elevated temperatures, typically around 500°C. This process is known as the conversion of acetylene to benzene or the dehydrogenation of acetylene.Here's how the catalyst mixture functions in this chemical process:Dehydrogenation Reaction: The conversion of acetylene to benzene involves the removal of hydrogen atoms from the acetylene molecule, resulting in the formation of benzene. This reaction is endothermic, meaning it requires heat to proceed. The elevated temperature of around 500°C provides the necessary energy for the reaction to occur.