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Consider the following statements :

  1. 1.Other than those made by humans, nanoparticles do not exist in nature.
  2. 2.Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics.
  3. 3.Nanoparticles of some commercial products which enter the environment are unsafe for humans.

Which of the statements given above is/are correct ?

  1. A.1 only
  2. B.3 only
  3. C.1 and 2
  4. D.2 and 3
▶ Answer & Explanation

Correct answer: D. 2 and 3

Naturally occurring nanoparticles exist in volcanic ash, minerals, and biological systems. Metallic oxide nanoparticles, such as titanium dioxide and zinc oxide, are indeed utilized in sunscreens and other cosmetics for their UV-blocking properties. While nanoparticles can offer benefits, concerns exist regarding the potential long-term environmental and health impacts of certain synthetic nanoparticles released into ecosystems, necessitating further research and regulation.

Source: UPSC gs1 2022

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