Question

An element E forms an oxide E2O. An aqueous solution of E2O turns red litmus paper blue. 1)what is the nature of the oxide E2O? 2)State whether element E is a metal or a non-metal 3)Give one example of an element like E

Answer 1

1. As the E2O turns red litmus to blue it is basic in nature.
2) Element E is a metal.
3) Example : Na is a metal . it forms Na2O and its aqueous solution gives NaOH which is basic in nature.
Na2O + H2O ----> 2NaOH

Answer 2

1. It is basic in nature. ( because it turns red litmus paper blue )

2. Element E is metal. ( because metal oxide are basic in nature )

3. E can be Sodium ( Na )