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September 9, 2026

UPSC Prelims 2025 GS Paper I Q28 — Chalk, Clay, Porosity and PermeabilityUPSC प्रीलिम्स 2025 GS पेपर I प्रश्न 28 — चॉक, मृत्तिका, सरंध्रता और पारगम्यता

About 2 min readPublished 9 September 2026
UPSC • Prelims • 2025 • Prelims GS Paper I Attempt the actual previous-year questions first. Official answer, analysis and elimination clue appear only after final submission.
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UPSC • Prelims • 2025 • Prelims GS Paper I
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Question 28
UPSCGeography2025Prelims GS Paper ISeries A
Subject / विषय: Geography

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?

निम्नलिखित कथनों पर विचार कीजिए :

कथन I : शैलों पर जल के प्रभाव के संदर्भ में, चॉक एक अत्यंत पारगम्य शैल के रूप में ज्ञात है, जबकि मृत्तिका एक नितांत अपारगम्य या न्यूनतम पारगम्य शैल के रूप में ज्ञात है।

कथन II : चॉक सरंध्र होता है, अतः जल अवशोषित कर सकता है।

कथन III : मृत्तिका बिल्कुल ही सरंध्र नहीं है।

उपर्युक्त कथनों के संदर्भ में, निम्नलिखित में से कौन-सा एक सही है?

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Author / EditorGoldej Kumar

Goldej Kumar is the Founder and Editor of Sri Ram Exams (Exam2.in), an independent educational platform for UPSC, State Public Service Commission, SSC and other competitive examinations. His editorial focus is on exam-relevant current affairs, source-based analysis, MCQ reasoning, previous-year-question patterns and clear bilingual learning for English- and Hindi-medium aspirants.