Question

An element E forms an oxide E2 An aqueous solution of E2O turns red litmus paper blue.
(a) What is the nature of the oxide E2O ?
(b) State whether element E is a metal or a non-metal.
(a) Give one example of an element like E.

Lakhmir Singh Chemistry Class 10

Answer 1

Answer:

A) basic in nature

B) metal

C) sodium

Answer 2

Explanation:

a. Since the aqueous solution of E2O turns the red litmus to blue, thus it is basic in nature.

2) Element E is a metal and not a non metal.

3) Since, Na (Sodium) is a metal it forms Na2O and its aqueous solution on formation gives NaOH which is basic in nature. The reaction which takes place is -

Na2O + H2O → 2NaOH