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GS Paper IUPSC Prelims 2002
Human & Political Geography
Question No. 59Interactive Test Mode
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+2-0.66

Q59. Consider the following ecosystems : 1. Taiga 2. Tropical Evergreen 3. Tropical Deciduous 4. Tundra The correct sequence in decreasing order of the Albedo values of these ecosystems is :

Consider the following ecosystems :

  1. Taiga
  2. Tropical Evergreen
  3. Tropical Deciduous
  4. Tundra The correct sequence in decreasing order of the Albedo values of these ecosystems is :
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 2002 • Geography

Correct Answer: Option (B) — 4, 1, 3, 2

Concept & Option Breakdown

Standard Reference Verified

Albedo is the fraction of incoming solar radiation reflected by a surface:

  1. Tundra (Highest albedo, ~80–90% during snow-covered periods and higher surface reflectance due to open snow/ice landscapes).
  2. Taiga (Second highest, ~30–50% in winter/snow-covered canopy, darker coniferous needles absorb more light than open snow).
  3. Tropical Deciduous Forest (Moderate albedo, ~15–20%, especially higher in the dry season when leaves are shed).
  4. Tropical Evergreen Forest (Lowest albedo, ~10–15%, dense multi-layered green canopy absorbs maximum insolation).

Therefore, the correct decreasing order is 4 → 1 → 3 → 2.

Elimination Heuristic & Exam Approach

Snow and ice have the highest terrestrial albedo, so Tundra (4) must be first. Dense, multi-layered evergreen canopies absorb the most radiation, so Tropical Evergreen (2) must be last.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2002 (Q59)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicGeography → Human & Political Geography
Official Answer KeyOption (B) — 4, 1, 3, 2

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Frequently Asked Questions — UPSC Prelims 2002 Q59

What is the official answer for UPSC Prelims 2002 GS Paper I Question 59 (Geography)?

The official UPSC answer key for this 2002 Geography (Human & Political Geography) question is Option (B): "4, 1, 3, 2". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2002 question belong to?

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

Snow and ice have the highest terrestrial albedo, so Tundra (4) must be first. Dense, multilayered evergreen canopies absorb the most radiation, so Tropical Evergreen (2) must be last.

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