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GS Paper IUPSC Prelims 2007
Health & Medicine
Question No. 255Interactive Test Mode
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Q255. Consider the following statements : 1. A flute of smaller length produces waves of lower frequency. 2. Sound travels in rocks in the form of longitudinal elastic waves only. Which of the statements given above is/are correct?

Consider the following statements :

  1. A flute of smaller length produces waves of lower frequency.
  2. Sound travels in rocks in the form of longitudinal elastic waves only.

Which of the statements given above is/are 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 2007 • Science and Technology

Correct Answer: Option (D) — Neither 1 nor 2

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is incorrect: The fundamental frequency of an air column is inversely proportional to its length (f = v / 2L for open pipes). Therefore, a shorter flute produces a higher pitch/frequency, not a lower frequency. Statement 2 is incorrect: Solids such as rocks have both bulk modulus and shear modulus, allowing seismic/sound vibrations to travel as both longitudinal waves (P-waves) and transverse/shear waves (S-waves).

Elimination Heuristic & Exam Approach

Watch out for the extreme qualifier 'only' in statement 2. Solids support both longitudinal and transverse wave propagation.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2007 (Q255)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — Neither 1 nor 2

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Frequently Asked Questions — UPSC Prelims 2007 Q255

What is the official answer for UPSC Prelims 2007 GS Paper I Question 255 (Science and Technology)?

The official UPSC answer key for this 2007 Science and Technology (Health & Medicine) question is Option (D): "Neither 1 nor 2". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2007 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?

Watch out for the extreme qualifier 'only' in statement 2. Solids support both longitudinal and transverse wave propagation.

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