X= H3PO4 P4O10 + 6 H2O == 4 H3PO4
Y= H3PO3 PCl3 + 3 H2O == H3PO3 + 3 HCl
An element X on reacting with oxygen forms an oxide X2O. This oxide dissolves in water and turns red litmus blue. State whether element X is a metal or a non metal. Explain with proper example.