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UPSC 1998: Which one of the following elements is essential for the construction of nuclear reactors?
(a)Cobalt
(b)Nickel
(c)Zirconium
(d)Tungsten
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Not attemptedCorrect Answer: (c) Zirconium
Zirconium alloys are used as cladding for fuel rods because the metal has an exceptionally low thermal-neutron absorption cross-section and resists corrosion at high temperatures, making it indispensable in reactor construction. The other metals listed are either too neutron-absorptive or lack the required corrosion/thermal characteristics. ([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): Zirconium. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Energy & Environment question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 1998, GS Paper 1, as Question 104. It falls under Science & Technology > Energy & Environment.
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 Energy & Environment?▼
UPSC has asked 48 questions from Energy & Environment (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.