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GS Paper IUPSC Prelims 2019
Ecology & Ecosystems
Question No. 77Interactive Test Mode
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Q77. In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned?

In the context of which one of the following are the terms ‘pyrolysis and plasma gasification’ mentioned?

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 2019 • Environment and Ecology

Correct Answer: Option (D) — Waste-to-energy technologies

Concept & Option Breakdown

Standard Reference Verified

Pyrolysis (thermal degradation of waste in the complete absence of oxygen) and Plasma Gasification (high-temperature thermal breakdown using plasma torches) are advanced thermal waste-to-energy technologies utilized to convert solid municipal and industrial wastes into combustible syngas.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2019 (Q77)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Ecology & Ecosystems
Official Answer KeyOption (D) — (d) Waste-to-energy technologies

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Frequently Asked Questions — UPSC Prelims 2019 Q77

What is the official answer for UPSC Prelims 2019 GS Paper I Question 77 (Environment and Ecology)?

The official UPSC answer key for this 2019 Environment and Ecology (Ecology & Ecosystems) question is Option (D): "(d) Waste-to-energy technologies". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2019 question belong to?

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

To solve Ecology & Ecosystems 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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