b
\(2Xe{F_6}\, + \,\mathop {Si{O_2}}\limits_{(glass)} \, \to \,\mathop {2XeO{F_4}}\limits_{(\exp losive\,\,nature)} \, + \,Si{F_4}\)

\(2XeO{F_4}\, + \, Si{O_2} \, \to \,2Xe{O_2}{F_2}\, + \,Si{F_4}\)

\(2Xe{O_2}{F_2}\, + \,Si{O_2}\, \to \,\mathop {2Xe{O_3}}\limits_{(\exp losive\,)} \, + \,Si{F_4}\)