An element X on reaction with O2 forms X2O


An element X on reaction with O2 forms X2O. This oxide dissolves in water and turns blue litmus paper red. Predict the nature of the oxide. Is the element X metal or non-metal?


The oxide is acidic in nature as it has turned blue litmus paper red. Hence, Xis a non-metal.


Can you please give some examples providing balanced chemical equations.


The element is sulphur dioxide,:blush::blush::blush:therefore it shows acidic nature


Element X is a non metal ,since non metallic oxides form acids by reacting with water. And an acid turns blue litmus red. We know that while writing chemical formula the valancies of the elements are interchanged, so the element X has valency 1.Since the element has valency 1 it is one of the element of halide group.i.e group 17.IMG_20190127_073727|690x474