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Question No. 110Interactive Test Mode
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Q110. The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs

The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs

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 2012 • Environment and Ecology

Correct Answer: Option (D) — The infrared part of the solar radiation.

Concept & Option Breakdown

Standard Reference Verified

Option (d) is correct: Carbon dioxide is transparent to incoming shortwave solar radiation but strongly absorbs outgoing terrestrial longwave infrared radiation (particularly around the 15 μm band), re-radiating heat back toward the surface and causing the greenhouse effect.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2012 (Q110)
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) — The infrared part of the solar radiation.

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Frequently Asked Questions — UPSC Prelims 2012 Q110

What is the official answer for UPSC Prelims 2012 GS Paper I Question 110 (Environment and Ecology)?

The official UPSC answer key for this 2012 Environment and Ecology (Climate Change & Global Warming) question is Option (D): "The infrared part of the solar radiation.". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2012 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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