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GS Paper IUPSC Prelims 2024
Natural Resources
Question No. 235Interactive Test Mode
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Q235. Consider the following materials: 1. Agricultural residues 2. Corn grain 3. Wastewater treatment sludge 4. Wood mill waste Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?

Consider the following materials:

  1. Agricultural residues
  2. Corn grain
  3. Wastewater treatment sludge
  4. Wood mill waste Which of the above can be used as feedstock for producing Sustainable Aviation Fuel?
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 2024 • Environment and Ecology

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

Concept & Option Breakdown

Standard Reference Verified

All four materials can serve as feedstocks for producing Sustainable Aviation Fuel (SAF):

  1. Agricultural residues (stalks, husks, bagasse) via Fischer-Tropsch (FT) or Alcohol-to-Jet (ATJ) pathways.
  2. Corn grain via starch-to-ethanol fermentation followed by Alcohol-to-Jet (ATJ) processing.
  3. Wastewater treatment sludge and other wet wastes via hydrothermal liquefaction (HTL) or anaerobic digestion.
  4. Wood mill wastes (sawdust, forestry residues) via gasification and Fischer-Tropsch synthesis.
Elimination Heuristic & Exam Approach

In broad science and technology potentiality questions ('Which of the following can be used...'), wide technical possibilities usually make inclusive all-of-the-above options correct.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2024 (Q235)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Natural Resources
Official Answer KeyOption (C) — 1, 2, 3 and 4

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Frequently Asked Questions — UPSC Prelims 2024 Q235

What is the official answer for UPSC Prelims 2024 GS Paper I Question 235 (Environment and Ecology)?

The official UPSC answer key for this 2024 Environment and Ecology (Natural Resources) question is Option (C): "1, 2, 3 and 4". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2024 question belong to?

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

In broad science and technology potentiality questions ('Which of the following can be used...'), wide technical possibilities usually make inclusive alloftheabove options correct.

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