Question

Q. Consider the following statements with reference to Nanomaterials,

Which of the above statements is/are correct?

• A. 1 only
• B. 2 and 3 only
• C. 2 only
• D. 1 and 3 only

Answer 1

The correct option is A 1 only

Explanation:

Statement 1 is correct:

• Incidental nanomaterial: These are unintentionally produced as a result of any form of direct or indirect human influence or anthropogenic process. Sources of incidental nanoparticles include vehicle engine exhausts, welding fumes, combustion processes from domestic solid fuel heating and cooking

Statement 2 is incorrect:

• Soot from forest fires is an example of a naturally occurring nanomaterial.
• Natural nanomaterial: These are made by nature through bio-geochemical or mechanical processes, without direct or indirect connection to human activity or anthropogenic processes. Nanomaterial that is naturally occurring includes volcanic ash, soot from forest fires.

Statement 3 is incorrect:

• Titanium dioxide nanoparticle is an example of engineering nanomaterial
• Engineered nanomaterial: A nanomaterial conceived, designed, and intentionally produced by humans. A titanium dioxide nanoparticle is a prominent example of it. It is used in sunscreens due to its ability to block UV radiation while remaining transparent on the skin.