gs1medium

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. 1.They can accumulate in the environment and contaminate water and soil.
  2. 2.They can enter the food chains.
  3. 3.They can trigger the production of free radicals.
  1. A.1 and 2 only
  2. B.3 only
  3. C.1 and 3 only
  4. D.1, 2 and 3
▶ Answer & Explanation

Correct answer: D. 1, 2 and 3

Nanoparticles, due to their small size and high surface area, can persist in the environment, leading to contamination of water and soil. Their ability to enter ecosystems also allows them to be ingested by organisms and move up the food chain, posing risks to wildlife and potentially humans. Furthermore, certain nanoparticles can interact with biological systems to generate reactive oxygen species (free radicals), which can cause cellular damage and oxidative stress.

Source: UPSC gs1 2014

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