Question

the oxide of which element forms basic oxide​

Answer 1

All oxides in Group 1 & 2 elements are basic (except BeO), they react with water to form a base: Lithium oxide reacts with water to produce Lithium hydroxide: Li2O(s) + H2O(l) → 2 Li+(aq) + 2 OH−(aq) Sodium oxide reacts with water to produce Sodium hydroxide: Na2O(s) + H2O(l) → 2 NaOH(aq)

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