Q. 7 C3.7( 3 Votes )

Consider the following statements and choose the right option given below:

Statement. Limestone regions have less underground water.

Reason. Water does not percolate through limestone.

a. The statement is right reason is wrong.

b. The statement is wrong reason is right.

c. The statement and reason are wrong.

d. The statement and reason are right.

Answer :

The underground water is the major reason for the formation of the karst topography. It is formed due to the dissolution of limestone, dolomite and gypsum with the groundwater. It is created because of the gradation, erosion and deposition of these soluble rocks with the groundwater. Most of the weathering and erosion occurs through chemical weathering. The solution is the main method of decomposition. Water reacts with the particles and substances found in the rocks, resulting in the breaking down of its particles from within. The reaction between the water molecules and the carbon dioxide in the atmosphere resulting in the formation of carbonic acids. The reaction of the carbonic acid with the carbonate rocks decomposes the rocks and results in its weathering. It basically occurs in the limestone region in the formation of caves. Thus, limestone regions have less surface run-off and underground water because of these reactions.

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