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GS Paper IUPSC Prelims 2003
Health & Medicine
Question No. 323Interactive Test Mode
00:00
+2-0.66

Q323. Which one of the following statements is NOT correct?

Which one of the following statements is NOT correct?

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 2003 • Science and Technology

Correct Answer: Option (D) — Barium and strontium are found free in nature.

Concept & Option Breakdown

Standard Reference Verified

Statement (d) is incorrect: Barium and strontium are highly electropositive alkaline earth metals (Group 2) that are extremely reactive and therefore never found in their elemental/free state in nature; they occur naturally only in mineral compounds (e.g., barytes, celestine, strontianite). Statements (a), (b), and (c) are correct factual statements.

Elimination Heuristic & Exam Approach

Highly reactive elements like alkali and alkaline earth metals never exist as free elements in nature.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2003 (Q323)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — Barium and strontium are found free in nature.

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Frequently Asked Questions — UPSC Prelims 2003 Q323

What is the official answer for UPSC Prelims 2003 GS Paper I Question 323 (Science and Technology)?

The official UPSC answer key for this 2003 Science and Technology (Health & Medicine) question is Option (D): "Barium and strontium are found free in nature.". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2003 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?

Highly reactive elements like alkali and alkaline earth metals never exist as free elements in nature.

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