Question

Why hydrogen peroxide is not stored in glass bottles?

Answer 1

because it reacts with glass means silica present in glass

Answer 2

hydrogen peroxide is a weak acid and due to its strong oxidising nature and peroxides is a compound in which oxygen atom is linked with each other by single covalent compound. some time in glass bottle the alkali metal is present in small amount that's why it is stored in brown bottles and placed in dark