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UPSC 2012: Graphene is frequently in news recently. What is its importance? 1. It is a two-dimensional material and has good electrical conductivity. 2. It is one of the thinnest but strongest materials tested so far. 3. It is entirely made of silicon and has high optical transparency. 4. It can be used as conducting electrodes required for touch screens, LCDs and organic LEDs. Which of the statements given above are correct?
(a)1 and 2 only
(b)3 and 4 only
(c)1, 2 and 4 only
(d)1, 2, 3 and 4
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Not attemptedCorrect Answer: (c) 1, 2 and 4 only
Graphene is a one-atom-thick (two-dimensional) sheet of carbon atoms with exceptional electrical conductivity (1) and is among the thinnest yet strongest materials tested (2). It is composed of carbon, not silicon, so statement 3 is wrong. Owing to its high conductivity and transparency it can serve as a flexible, transparent electrode in touch-screens, LCDs and OLEDs (4). Thus statements 1, 2 and 4 are correct. ([iasexamportal.com](https://iasexamportal.com/download/upsc-ias-pre-2012-gs-question-paper-i-with-answer-key-english?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2012 Science & Technology question?▼
The correct answer is option (c): 1, 2 and 4 only. 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 2012, GS Paper 1, as Question 14. 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.