Question

An unknown element X reacts with air to form its oxide Y. This Y dissolves in water which turns blue litmus paper into red . Predict whether X is a metal or a non metal.

Answer 1

Answer: Here, X is a non metal because the oxides of a non metals are acidic in nature.

As a result, non metal oxides dissolve in water which turns blue litmus paper into red .

Answer 2

X is a non metal.

as when X reacts with oxygen it forms a non-metallic oxide which is acidic in nature. hence when dissolved in water it has acidic properties and will turn blue litmus red.