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GS Paper IUPSC Prelims 2008
Health & Medicine
Question No. 316Interactive Test Mode
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+2-0.66

Q316. Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

Which one of the following pairs of metals constitutes the lightest metal and the heaviest metal, respectively?

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 2008 • Science and Technology

Correct Answer: Option (B) — Lithium and osmium

Concept & Option Breakdown

Standard Reference Verified
  • Lithium is the lightest metal and least dense solid element, with a density of approximately 0.534 g/cm³.
  • Osmium is the densest (heaviest per unit volume) naturally occurring element, with a density of approximately 22.59 g/cm³.
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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2008 (Q316)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — Lithium and osmium

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Frequently Asked Questions — UPSC Prelims 2008 Q316

What is the official answer for UPSC Prelims 2008 GS Paper I Question 316 (Science and Technology)?

The official UPSC answer key for this 2008 Science and Technology (Health & Medicine) question is Option (B): "Lithium and osmium". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2008 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?

To solve Health & Medicine questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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