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GS Paper IUPSC Prelims 2023
Health & Medicine
Question No. 149Interactive Test Mode
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Q149. Consider the following heavy industries: 1. Fertilizer plants 2. Oil refineries 3. Steel plants Green hydrogen is expected to play a significant role in decarbonizing how many of the above industries?

Consider the following heavy industries:

  1. Fertilizer plants
  2. Oil refineries
  3. Steel plants

Green hydrogen is expected to play a significant role in decarbonizing how many of the above industries?

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 2023 • Science and Technology

Correct Answer: Option (C) — All three

Concept & Option Breakdown

Standard Reference Verified

Green hydrogen is expected to play a major decarbonization role across all three sectors:

  • Fertilizer plants: Green hydrogen replaces fossil-derived hydrogen in the production of green ammonia for fertilizers.
  • Oil refineries: It substitutes grey hydrogen in hydrotreating and hydrocracking processes.
  • Steel plants: It acts as a clean reducing agent replacing coal/coke in the Direct Reduced Iron (DRI) process to produce green steel.
Elimination Heuristic & Exam Approach

Apply the 'NOT' approach: If denying that green hydrogen can contribute to decarbonizing a specific heavy industry is technologically untrue or improbable, the statement is plausibly correct.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2023 (Q149)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (C) — All three

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Frequently Asked Questions — UPSC Prelims 2023 Q149

What is the official answer for UPSC Prelims 2023 GS Paper I Question 149 (Science and Technology)?

The official UPSC answer key for this 2023 Science and Technology (Health & Medicine) question is Option (C): "All three". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2023 question belong to?

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

Apply the 'NOT' approach: If denying that green hydrogen can contribute to decarbonizing a specific heavy industry is technologically untrue or improbable, the statement is plausibly correct.

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