The chemical formula for clay is \(Al2O3⋅2SiO2⋅2H2O\), representing alumina, silica, and water. Other options are incorrect and represent other compounds.
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: