A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element is present in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.
OR
A substance X, which is an oxide of a metal is used intensively in the cement industry. This metal element is present in bones also. On treatment with water, it forms a solution which turns red litmus blue. Identify X and also write the equation for its chemical reaction with water.