GyanGramConsider the following statements: 1. Other than those made by humans, nanoparticles do not exist in nature.…
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Consider the following statements:
1. Other than those made by humans, nanoparticles do not exist in nature.
2. Nanoparticles of some metallic oxides are used in the manufacture of some cosmetics
3. Nanoparticles of some commercial products which enter the environment are unsafe for humans.
Which of the statements given above is/are correct?
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• Correct Answer: D
• Metallic oxide nanoparticles (TiO2, ZnO) are used in cosmetics; some environmental nanoparticles pose respiratory toxicity risks.
• Statement 1 is incorrect: natural nanoparticles occur via volcanic eruptions, ocean spray, and biological processes.
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