Consider the following statements:In the context of effect of water on rocks, chalk is known as a ve

Question

Consider the following statements:In the context of effect of water on rocks, chalk is known as a very permeable rock whereas clay is known as quite an impermeable or least permeable rock.Chalk is porous and hence can absorb water.Clay is not at all porous.Which one of the following is correct in respect of the above statements?

Accepted Answer

Permeable Rocks: These rocks allow water to pass through them because they have interconnected pore spaces, which create pathways for water flow. Impermeable Rocks: These rocks restrict water movement because their pore spaces are not well- connected or are very small, making it difficult for water to infiltrate. Chalk is generally considered a very permeable rock, meaning water can easily pass through it, while clay is known for being quite impermeable or having a low permeability, meaning water has difficulty passing through it. Hence, statement I is correct. Chalk is composed of tiny shells, leaving behind a porous structure with many interconnected spaces. This porous structure allows water to easily seep through the chalk, making it a good aquifer for groundwater storage. Hence, statement II is correct and it explains statement I correctly. Clay is made of very small, tightly packed particles. The small size and tight packing create a low porosity with very little interconnected pore space, which makes it difficult for water to flow through. This low permeability can lead to water accumulating on top of clay layers or being diverted around them. Hence, statement III is not correct.