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GS Paper IUPSC Prelims 2008
Health & Medicine
Question No. 346Interactive Test Mode
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+2-0.66

Q346. Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

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 2008 • Science and Technology

Correct Answer: Option (C) — Methane and air

Concept & Option Breakdown

Standard Reference Verified

Methane (known as firedamp in coal mining) accumulates in underground coal seams. When methane mixes with atmospheric air (oxygen) within an explosive range (typically 5–15%), any spark can trigger devastating mine explosions.

Elimination Heuristic & Exam Approach

Coal mine firedamp explosions are caused by methane gas ignited in the presence of air.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2008 (Q346)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — Methane and air

Related & Repeated Prelims PYQs (1)

Questions from other UPSC Prelims years testing the same or closely linked concept.

View Cluster in 3D Graph
2000 • Q30897% Match

Most of the explosions in mines occur due to the mixing of:

Science and Technology • Health & MedicineSolve

More PYQs from Science and Technology (Health & Medicine)

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Match List-I (Fuel gases) with List-II (Major constituents) and select the correct answer using the codes given below the lists: | List-I | List-II |

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Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?

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Frequently Asked Questions — UPSC Prelims 2008 Q346

What is the official answer for UPSC Prelims 2008 GS Paper I Question 346 (Science and Technology)?

The official UPSC answer key for this 2008 Science and Technology (Health & Medicine) question is Option (C): "Methane and air". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2008 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?

Coal mine firedamp explosions are caused by methane gas ignited in the presence of air.

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