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GS Paper IUPSC Prelims 1999
Health & Medicine
Question No. 233Interactive Test Mode
00:00
+2-0.66

Q233. For which one of the following is capillarity not the reason?

For which one of the following is capillarity not the reason?

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 1999 • Science and Technology

Correct Answer: Option (B) — Rising of underground water

Concept & Option Breakdown

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Option (a): Blotting paper has fine pores that act as narrow capillary tubes, drawing ink through capillary action. Option (b): The rising of underground water (such as in artesian wells or deep aquifers) is primarily driven by hydrostatic pressure gradients, not capillarity. Option (c): Cotton cloth fibers form micro-channels that draw liquid through capillary action. Option (d): Capillary action, along with root pressure and transpiration pull, plays a key role in water movement in plant xylem vessels.

Elimination Heuristic & Exam Approach

Underground water tables and artesian aquifers depend on broad hydrostatic pressure differences rather than surface-tension-driven capillary phenomena.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 1999 (Q233)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — Rising of underground water

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Frequently Asked Questions — UPSC Prelims 1999 Q233

What is the official answer for UPSC Prelims 1999 GS Paper I Question 233 (Science and Technology)?

The official UPSC answer key for this 1999 Science and Technology (Health & Medicine) question is Option (B): "Rising of underground water". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 1999 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

Underground water tables and artesian aquifers depend on broad hydrostatic pressure differences rather than surfacetensiondriven capillary phenomena.

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