Silica is almost non-reactive due to the presence of very strong Si-C bonds. They are unaffected by dihydrogen, halogen and acids except \\\\(HF\\\\) and \\\\(NaOH\\\\) to form \\\\(SiF_4\\\\) and \\\\(Na_2SiO_3\\\\) respectively. The reaction is as follow:\\\\(SiO_{2} + 2NaOH \\rightarrow Na_{2}SiO_{3} +H_{2}O\\\\)