A yellow coloured element ‘X’ on reacting with oxygen forms an oxide ‘XO2’, which dissolves in water and turns blue litmus paper to red
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this is acidic oxide and then dissolves in water and make acidic hydroxide
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We are given that the element forms a water soluble oxide with the chemical formula X2O, which turns blue litmus paper red. This means that the oxide is acidic in nature, and acidic oxides are formed by non-metals. Thus, the element X is a non-metal.
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