Question

An element X on reacting with oxygen forms and oxide X2O. The oxide dissolves in water and turns blue Litmus red then predict the nature of the element whether it is metal or nonmetal​

Answer 1

It is non metal because non metal oxides are acidic in nature

Answer 2

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The oxide of element dissolves in water to form a solution which turns blue litmus paper into red litmus. This means that the oxide $'X_2O'$ is of acidic nature. Therefore, the element 'X' is a non-metal because the oxides of the non-metals are of acidic nature. We know that the oxides of non-metal are always acidic in nature.