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UPSC 2000: Most of the explosions in mines occur due to the mixing of
(a)hydrogen with oxygen
(b)oxygen with acetylene
(c)methane with air
(d)carbon dioxide with ethane
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Not attemptedCorrect Answer: (c) methane with air
‘Firedamp’—methane (CH₄) that seeps from coal seams—forms explosive mixtures with air at concentrations of about 5–15 %. Most underground mine blasts are therefore due to methane-air mixtures, not hydrogen–oxygen, oxygen–acetylene or carbon-dioxide–ethane combinations. ([focusias.in](https://focusias.in/upsc-general-studies-prelims-paper-2000/))
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What is the correct answer to this UPSC 2000 Science & Technology question?▼
The correct answer is option (c): methane with air. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Health & Diseases question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2000, GS Paper 1, as Question 107. It falls under Science & Technology > Health & Diseases.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Health & Diseases?▼
UPSC has asked 86 questions from Health & Diseases (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.