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GS Paper IUPSC Prelims 2013
Climatology & Atmosphere
Question No. 38Interactive Test Mode
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+2-0.66

Q38. During a thunderstorm, the thunder in the skies is produced by the : 1. Meeting of cumulonimbus clouds in the sky. 2. Lightning that separates the nimbus clouds. 3. Violent upward movement of air and water particles. Select the correct answer using the codes given below :

During a thunderstorm, the thunder in the skies is produced by the :

  1. Meeting of cumulonimbus clouds in the sky.
  2. Lightning that separates the nimbus clouds.
  3. Violent upward movement of air and water particles. Select the correct answer using the codes given below :
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 2013 • Geography

Correct Answer: Option (D) — None of the above

Concept & Option Breakdown

Standard Reference Verified

Thunder is caused by the sudden thermal expansion of air surrounding a lightning bolt. When lightning strikes, the air is heated instantaneously to temperatures up to 30,000 K, producing an explosive shock wave that travels as sound (thunder). Statements 1, 2, and 3 are incorrect descriptions of the physical source of thunder sound waves.

Elimination Heuristic & Exam Approach

Recall basic physics: thunder is the acoustic shockwave caused solely by the instantaneous heating and rapid expansion of air by a lightning discharge.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2013 (Q38)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicGeography → Climatology & Atmosphere
Official Answer KeyOption (D) — None of the above

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Frequently Asked Questions — UPSC Prelims 2013 Q38

What is the official answer for UPSC Prelims 2013 GS Paper I Question 38 (Geography)?

The official UPSC answer key for this 2013 Geography (Climatology & Atmosphere) question is Option (D): "None of the above". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2013 question belong to?

This question belongs to GS Paper I under the subject "Geography" and micro-topic "Climatology & Atmosphere". You can explore all repeated questions from Climatology & Atmosphere 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 Climatology & Atmosphere UPSC Prelims question using option elimination?

Recall basic physics: thunder is the acoustic shockwave caused solely by the instantaneous heating and rapid expansion of air by a lightning discharge.

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