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UPSC 2014: There is some concern regarding the nanoparticles of some chemical elements that are used by the industry in the manufacture of various products. Why? 1. They can accumulate in the environment, and contaminate water and soil. 2. They can enter the food chains. 3. They can trigger the production of free radicals. Select the correct answer using the code given below.
(a)1 and 2 only
(b)3 only
(c)1 and 3 only
(d)1, 2 and 3
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Not attemptedCorrect Answer: (d) 1, 2 and 3
Engineered nanoparticles can persist in soil and water, bio-accumulate and move up food chains, and their surfaces or dissolved metal ions can generate reactive oxygen species/free radicals, leading to oxidative stress. All three listed effects are scientifically documented; therefore statements 1, 2 and 3 are correct. ([clearias.com](https://www.clearias.com/upsc-prelims-2014-answer-key-solved-questions-gs-paper-1/))
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Frequently Asked Questions
What is the correct answer to this UPSC 2014 Science & Technology question?▼
The correct answer is option (d): 1, 2 and 3. 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 2014, GS Paper 1, as Question 98. 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.