Concept:Chemical weathering involves changes in the chemical composition of rocks, while physical weathering involves mechanical breakdown.
Explanation:Option A: Solution is the dissolving of minerals in water, which is a chemical process.
Option B: Oxidation is the reaction of minerals with oxygen, forming new compounds, so it is chemical.
Option D: Carbonation occurs when carbon dioxide in water reacts with minerals like calcium carbonate, also chemical.
Option C: Alternating wet and dry conditions mainly causes expansion and contraction of rocks, leading to physical disintegration, not chemical change.
Therefore, the process that is not chemical weathering is alternating of wet and dry land.
Answer:C. alternating of wet and dry land.