Question

An elemnet reacts with air to form its oxide. when dissolved in water the solution turns red litmus blue. is it a metal or a non metal? give examples

Answer 1

it turns red litmus to blue, which implies that it is a base.
now, we know that metal oxides are basic in nature .
therefore, the given element is a metal.

for eg Na2O+H2O----NaOH(which is a base and which turns red litmus to blue) hope it helps you ☺️☺️