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Question No. 112Interactive Test Mode
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Q112. Consider the following: 1. Carbon dioxide 2. Oxides of Nitrogen 3. Oxides of Sulphur Which of the above is/are the emission/emissions from coal combustion at thermal power plants?

Consider the following:

  1. Carbon dioxide
  2. Oxides of Nitrogen
  3. Oxides of Sulphur Which of the above is/are the emission/emissions from coal combustion at thermal power plants?
Select the correct option below (or cross out options to eliminate)

Official Answer Key & Detailed Solution

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Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2011 • Environment and Ecology

Correct Answer: Option (D) — 1, 2 and 3

Concept & Option Breakdown

Standard Reference Verified

Coal contains carbon, sulphur, and nitrogen compounds, and high-temperature combustion in air oxidizes atmospheric nitrogen as well. Consequently, coal-fired power plants emit Carbon dioxide (CO₂), Oxides of Sulphur (SO₂/SO₃), and Oxides of Nitrogen (NO/NO₂).

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2011 (Q112)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Climate Change & Global Warming
Official Answer KeyOption (D) — 1, 2 and 3

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Frequently Asked Questions — UPSC Prelims 2011 Q112

What is the official answer for UPSC Prelims 2011 GS Paper I Question 112 (Environment and Ecology)?

The official UPSC answer key for this 2011 Environment and Ecology (Climate Change & Global Warming) question is Option (D): "1, 2 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2011 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Climate Change & Global Warming". You can explore all repeated questions from Climate Change & Global Warming 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 Climate Change & Global Warming UPSC Prelims question using option elimination?

To solve Climate Change & Global Warming questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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