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.

Compound X is Calcium oxide.

(CaO is extensively used in the cement industry. On treatment with water, CaO produces Ca(OH)₂ which is alkaline in nature and turns red litmus to blue colour.)

$Ca + H_2O→ Ca(OH)_2$