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UPSC 1998: Consider the following statements: Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to I. act as a reducing agent. II. remove silica associated with the iron ore. III. function as fuel, to supply heat. IV. act as an oxidizing agent. Of these statements:
(a)I and II are correct
(b)II and IV are correct
(c)I and III are correct
(d)III and IV are correct
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Not attemptedCorrect Answer: (c) I and III are correct
In a blast furnace coke serves a dual role: (I) as a reducing agent it donates carbon monoxide that converts Fe₂O₃/Fe₃O₄ to metallic iron, and (III) as the chief fuel it supplies the high temperatures (~2000 °C) needed. It neither removes silica (that is done by limestone) nor acts as an oxidising agent. ([licchavilyceum.com](https://licchavilyceum.com/upsc-civil-services-prelims-1998-solved-question-paper/))
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Frequently Asked Questions
What is the correct answer to this UPSC 1998 Science & Technology question?▼
The correct answer is option (c): I and III are correct. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Materials & Engineering question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 106. It falls under Science & Technology > Materials & Engineering.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Materials & Engineering?▼
UPSC has asked 23 questions from Materials & Engineering (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.