A substance ‘A’, 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 A’ and also write the chemical reactions involved.
The available information suggests that the substance A’ is oxide of the element calcium (Ca) which is present in group 2 of the periodic table.
Calcium is also a constituent of our bones in the form of calcium phosphate. . Calcium oxide (CaO) reacts with water to form calcium hydroxide
(basic in nature). It forms a basic solution which turns red litmus blue.