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GS Paper IUPSC Prelims 2001
Health & Medicine
Question No. 248Interactive Test Mode
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Q248. When water is heated from 0°C to 10°C. Its volume:

When water is heated from 0°C to 10°C. Its volume:

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 2001 • Science and Technology

Correct Answer: Option (D) — first decreases and then increases

Concept & Option Breakdown

Standard Reference Verified

Due to the anomalous expansion of water, when water is heated from 0°C to 4°C, it contracts and its volume decreases, reaching maximum density (minimum volume) at 4°C. Heating beyond 4°C causes it to expand normally, increasing its volume. Hence, from 0°C to 10°C, its volume first decreases and then increases.

Elimination Heuristic & Exam Approach

Recall the anomalous expansion of water: water has maximum density at 4°C, which means volume reaches a minimum at 4°C.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2001 (Q248)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — first decreases and then increases

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Frequently Asked Questions — UPSC Prelims 2001 Q248

What is the official answer for UPSC Prelims 2001 GS Paper I Question 248 (Science and Technology)?

The official UPSC answer key for this 2001 Science and Technology (Health & Medicine) question is Option (D): "first decreases and then increases". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2001 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?

Recall the anomalous expansion of water: water has maximum density at 4°C, which means volume reaches a minimum at 4°C.

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Previous QuestionAssertion (A): The boiling point of water decreases as the altitude increases. Reason (R): The atmospheric pressure increases with altitude. Codes:
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