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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?
2022Sci & Tech
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?
Explanation
Nanoparticles of some metallic oxides are indeed used in the manufacture of cosmetics. Additionally, nanoparticles from certain commercial products can pose risks to human health when they enter the environment.
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.
2014Sci & Tech
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.
Explanation
The use of nanoparticles of certain chemical elements in industrial products has raised concerns for several reasons. Firstly, these nanoparticles can build up in the environment, leading to contamination of water and soil. Additionally, they have the potential to enter food chains, posing a risk to organisms within the ecosystem. Furthermore, the presence of these nanoparticles may stimulate the production of free radicals, which can have harmful effects on living organisms. The correct answer, encompassing all these concerns, is option (d) - 1, 2, and 3.