Chemical weathering occurs when water dissolves minerals in rocks, resulting in new compounds. This is also known as hydrolysis. An example would be when water comes in the proximity of granite. Feldspar crystals present inside the rock react chemically, forming clay minerals.
Rusting iron because of oxidation is the best example of chemical weathering. Oxidation occurs where there is ready access to the atmosphere and oxygenated waters. The minerals most commonly involved in this process are iron, manganese, sulphur etc.
Chemical weathering results in changing the composition of minerals present in the rocks. Old minerals get decomposed and new minerals are formed. It is the erosion or distintegration of rocks by chemical reactions rather that mechanical ones.
It takes place in the presence of water in the joints and fissures of the rocks.
Main processes are listed below :
1. Oxidation - process by which minerals in the rock absorb oxygen from the air.
2. Carbonation -refers to absorption of CO2 from the atmosphere by minerals present in the rocks.
3.Hydration -in it, some minerals in crystalline form absorb water and become a powdery mass.
Answers & Comments
Answer:
Chemical weathering occurs when water dissolves minerals in rocks, resulting in new compounds. This is also known as hydrolysis. An example would be when water comes in the proximity of granite. Feldspar crystals present inside the rock react chemically, forming clay minerals.
Rusting iron because of oxidation is the best example of chemical weathering. Oxidation occurs where there is ready access to the atmosphere and oxygenated waters. The minerals most commonly involved in this process are iron, manganese, sulphur etc.
Explanation:
Chemical weathering results in changing the composition of minerals present in the rocks. Old minerals get decomposed and new minerals are formed. It is the erosion or distintegration of rocks by chemical reactions rather that mechanical ones.
It takes place in the presence of water in the joints and fissures of the rocks.
Main processes are listed below :
1. Oxidation - process by which minerals in the rock absorb oxygen from the air.
2. Carbonation - refers to absorption of CO2 from the atmosphere by minerals present in the rocks.
3. Hydration - in it, some minerals in crystalline form absorb water and become a powdery mass.
4. Solution - simplest form