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GS Paper IUPSC Prelims 1999
Human & Political Geography
Question No. 507Interactive Test Mode
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+2-0.66

Q507. Which one of the following types of coal contains a higher percentage of carbon than the rest ?

Which one of the following types of coal contains a higher percentage of carbon than the rest ?

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 1999 • Geography

Correct Answer: Option (D) — Anthracite

Concept & Option Breakdown

Standard Reference Verified

Anthracite is the highest grade of coal, containing 86% to 98% pure carbon. The ranking of coal by carbon content from lowest to highest is: Peat (<40-50%) < Lignite (60-70%) < Bituminous (75-85%) < Anthracite (>85%).

Elimination Heuristic & Exam Approach

Remember the standard coal formation hierarchy: Peat -> Lignite -> Bituminous -> Anthracite (lowest to highest carbon content and calorific value).

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 1999 (Q507)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicGeography → Human & Political Geography
Official Answer KeyOption (D) — Anthracite

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Frequently Asked Questions — UPSC Prelims 1999 Q507

What is the official answer for UPSC Prelims 1999 GS Paper I Question 507 (Geography)?

The official UPSC answer key for this 1999 Geography (Human & Political Geography) question is Option (D): "Anthracite". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 1999 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?

Remember the standard coal formation hierarchy: Peat > Lignite > Bituminous > Anthracite (lowest to highest carbon content and calorific value).

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