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प्रश्न
What are the main types of chemical weathering?
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उत्तर
Water plays an important role in chemical weathering. Rock is a mixture of many minerals. Water is a universal solvent. Many things get dissolved easily in water. The solubility increases because the matter has dissolved in water. And those materials which do not dissolve easily in water get dissolved in such solutions. In areas that receive heavy rainfall, chemical weathering occurs in the following way.
- Carbonation: The rainwater travels through the atmosphere before reaching the ground. Carbon dioxide in the air gets mixed in the water in this process. Dilute carbonic acid gets formed. Materials like limestone get easily dissolved in such acids.
- Solution: Some minerals in the rock get dissolved in water. Limestone is formed due to chemical precipitation between water and alkalis. Similarly, because of solution, alkalis in the rock dissolve and make them brittle.
- Oxidation: This process occurs in rocks which have iron present in them. The iron in the rock comes in contact with water and chemical reaction takes place between iron and oxygen. Hence, a reddish coloured layer forms on the rocks.
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संबंधित प्रश्न
Identify the type of weathering from the given description.
The rock rusts.
Say whether the following is ‘True’ or ‘False’.
In Polar regions there is no chemical weathering.
Describe chemical weathering, mentioning the processes involved in it.
Distinguish between the following :
Granular Disintegration and Block Disintegration.
Distinguish between the following :
Solution and Hydration
Give reasons for the following :
Presence of water aids chemical weathering.
Hydration comes under ______.
Distinguish between
Oxidation and Carbonation
The process of dissolution of rock substances in water is ______.
This ______ generally originate from mountains.
