Which of the following agents is not associated with chemical weathering?

The agent that is not associated with chemical weathering is pressure. Chemical weathering is the breakdown or decomposition of rocks and minerals caused by chemical reactions with substances such as water, oxygen, and acids. Oxidation is the process where oxygen reacts with a substance and changes its chemical composition, resulting in the breakdown of rocks and minerals. Hydrolysis is the process where water reacts with minerals and rocks and causes them to break down. Carbonation is a chemical reaction where carbon dioxide reacts with water to form carbonic acid, which can dissolve minerals in rocks, resulting in their breakdown. However, pressure is a physical weathering agent that causes rocks to break down through physical forces, such as compression or tension, rather than chemical reactions. Examples of physical weathering agents include water, wind, and ice. These agents can cause rocks to break down into smaller pieces without changing their chemical composition. Therefore, pressure is not associated with chemical weathering, but rather with physical weathering.