an element X on reacting with o2 forms x2o . this oxide dissolves in water and turns blue litmus paper red .predict the nature of element whether metal or non metal .reasons?

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Solution

In the question the oxide of the element X, turns blue litmus red, upon dissolution in water, which implies that the oxide is acidic in nature. Non-metals generally form acidic oxides, therefore the element X should be a non-metal.

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