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GS Paper IUPSC Prelims 1999
Health & Medicine
Question No. 335Interactive Test Mode
00:00
+2-0.66

Q335. Match List-I (Naturally occurring substances) with List-II (Elements) and select the correct answer using the codes given the lists: | List-I | List-II | | :--- | :--- | | A. Diamond | 1. Calcium | | B. Marble | 2. Silicon | | C. Sand | 3. Aluminium | | D. Ruby | 4. Carbon | Codes:

Match List-I (Naturally occurring substances) with List-II (Elements) and select the correct answer using the codes given the lists:

List-IList-II
A. Diamond1. Calcium
B. Marble2. Silicon
C. Sand3. Aluminium
D. Ruby4. Carbon

Codes:

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 (D) — A - 4; B- 1; C- 2; D-3

Concept & Option Breakdown

Standard Reference Verified
  • Diamond is an allotrope of elemental Carbon (A matches 4).
  • Marble is composed primarily of calcium carbonate ($\text{CaCO}_3$), containing Calcium (B matches 1).
  • Sand is mainly silicon dioxide ($\text{SiO}_2$), containing Silicon (C matches 2).
  • Ruby is corundum ($\text{Al}_2\text{O}_3$), containing Aluminium with trace chromium (D matches 3). Thus, the correct matching is A-4, B-1, C-2, D-3.
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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 1999 (Q335)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — A - 4; B- 1; C- 2; D-3

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Frequently Asked Questions — UPSC Prelims 1999 Q335

What is the official answer for UPSC Prelims 1999 GS Paper I Question 335 (Science and Technology)?

The official UPSC answer key for this 1999 Science and Technology (Health & Medicine) question is Option (D): "A - 4; B- 1; C- 2; D-3". 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?

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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