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UPSC 2007: Which one of the following non-metals is NOT a poor conductor of electricity?
(a)Sulphur
(b)Selenium
(c)Bromide
(d)Phosphorus
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Not attemptedCorrect Answer: (b) Selenium
Among the listed non-metals, selenium behaves as a semiconductor; its electrical conductivity increases on illumination or heating, so it is not a ‘poor’ conductor. Sulphur, bromine (listed as bromide) and phosphorus are all very poor conductors of electricity. ([scribd.com](https://www.scribd.com/document/818283438/2007-GS1-Set-A-Wth-Answers))
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Frequently Asked Questions
What is the correct answer to this UPSC 2007 Science & Technology question?▼
The correct answer is option (b): Selenium. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Electrical Conductivity of Non-metals question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2007, GS Paper 1, as Question 104. It falls under Science & Technology > Electrical Conductivity of Non-metals.
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 Electrical Conductivity of Non-metals?▼
UPSC has asked 1 questions from Electrical Conductivity of Non-metals (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.