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GS Paper IUPSC Prelims 1997
Health & Medicine
Question No. 235Interactive Test Mode
00:00
+2-0.66

Q235. The tendency of a liquid drop to contract and occupy minimum area is due to:

The tendency of a liquid drop to contract and occupy minimum area is due to:

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 1997 • Science and Technology

Correct Answer: Option (A) — surface tension

Concept & Option Breakdown

Standard Reference Verified

Surface tension is the elastic tendency of a fluid surface that makes it acquire the least surface area possible. Because molecules at the surface experience an unbalanced net inward cohesive pull, the liquid minimizes its surface area, leading to spherical droplets.

Elimination Heuristic & Exam Approach

For a given volume, a sphere has the minimum surface area, caused by surface tension.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 1997 (Q235)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (A) — surface tension

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Frequently Asked Questions — UPSC Prelims 1997 Q235

What is the official answer for UPSC Prelims 1997 GS Paper I Question 235 (Science and Technology)?

The official UPSC answer key for this 1997 Science and Technology (Health & Medicine) question is Option (A): "surface tension". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 1997 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?

For a given volume, a sphere has the minimum surface area, caused by surface tension.

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