Which of the following represents the process of chemical weathering?

Hydration and Hydrolysis represents the process of chemical weathering. In Hydration, Chemical combination of water molecules with a particular substance or mineral leading to a change in structure. In Hydrolysis, Most important process in chemical weathering. It is due to the dissociation of H₂O into H+ and OH- ions which chemically combine with minerals and bring about changes, such as exchange, decomposition of crystalline structure and formation of new compounds. Water acts as a weak acid on silicate minerals.