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?
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A hard Geography multiple-choice question from UPSC Prelims 2025. Attempt it above, then check the correct answer and detailed explanation below.
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Correct answer: C. Only one of the Statements II and III is correct and that explains Statement I
Statement II is correct and explains Statement I — chalk is porous, so it absorbs and transmits water (permeable). Statement III is incorrect — clay is actually porous but impermeable (its pores are too fine to let water pass through).
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