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GS Paper IUPSC Prelims 2008
Health & Medicine
Question No. 314Interactive Test Mode
00:00
+2-0.66

Q314. What are Rubies and Sapphires chemically known as?

What are Rubies and Sapphires chemically known as?

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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) — Aluminium oxide

Concept & Option Breakdown

Standard Reference Verified

Rubies and sapphires are gem varieties of the mineral corundum, which is crystalline aluminium oxide (Al₂O₃). Trace impurities give them distinct colors: chromium yields the red hue in rubies, while combinations of iron and titanium create the characteristic blue of sapphires.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2008 (Q314)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (B) — Aluminium oxide

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Frequently Asked Questions — UPSC Prelims 2008 Q314

What is the official answer for UPSC Prelims 2008 GS Paper I Question 314 (Science and Technology)?

The official UPSC answer key for this 2008 Science and Technology (Health & Medicine) question is Option (B): "Aluminium oxide". 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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