Consider the following statements

2025

Consider the following statements:

Statement I:
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.

Statement II:
Chalk is porous and hence can absorb water.

Statement III:
Clay is not at all porous.

Which one of the following is correct in respect of the above statements?

(a)

Both Statement II and Statement III are correct and both of them explain Statement I

(b)

Both Statement II and Statement III are correct but only one of them explains Statement I

(c)

Only one of the Statements II and III is correct and that explains Statement I

(d)

Neither Statement II nor Statement III is correct

Explanation

Answer: (c) Only one of the Statements II and III is correct and that explains Statement I Explanation: • Statement I: Chalk is highly permeable due to its porosity, allowing water to pass through, while clay is impermeable due to its fine particles. This is correct. • Statement II: Chalk’s porosity allows it to absorb water, explaining its permeability. This is correct. • Statement III: Clay is porous but has low permeability due to its tightly packed structure, so it is not “not at all porous.” This is incorrect. • Explanation Check: Statement II explains the permeability of chalk in Statement I, but Statement III is incorrect. Thus, (c) is the answer.