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प्रश्न
Describe chemical weathering, mentioning the processes involved in it.
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उत्तर
Chemical weathering refers to the breakdown of rocks through chemical reactions that alter the mineral composition of the rocks. This process is largely driven by water, oxygen, carbon dioxide, and organic acids. The four main processes involved in chemical weathering are:
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Solution: Minerals like salts, especially soluble minerals, dissolve in water, breaking down the rock.
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Carbonation: Carbon dioxide reacts with minerals like calcium carbonate (in limestone) to form carbonic acid, which dissolves the minerals.
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Oxidation: Oxygen reacts with iron-rich minerals in the rocks (e.g., haematite or magnetite), causing them to form iron oxide (rust), weakening the rock structure.
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Hydration: Water interacts with minerals in rocks, causing them to absorb water, expand, and become heavier, which leads to the breakdown of the rock.
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संबंधित प्रश्न
Identify the type of weathering from the given description.
The rock rusts.
Distinguish between the following pair
Hydration and solution
Give two differences between physical and chemical weathering.
Name the gases involved in the process of chemical weathering.
Rewrite the following sentence, choosing the right word from the options given below:
_______ occurs when the water itself combines chemically with some element or mineral.
Distinguish between the following :
Solution and Hydration
Give reasons for the following :
Presence of water aids chemical weathering.
Give Reasons:
Chemical weathering is predominant in hot and humid zones.
Distinguish between
Oxidation and Carbonation
This ______ generally originate from mountains.
