GCSE Chemistry - Nanoparticles #22

The video tutorial explores nanoparticles, tiny particles with diameters between 1 and 100 nanometers, and their unique properties, such as a high surface area to volume ratio. These properties make them useful in various applications, including as catalysts in chemical reactions, in nanomedicine for drug delivery, and in electronics for creating tiny circuits. However, the video also highlights the potential risks and the need for regulation, as the effects of nanoparticles on the human body and the environment are not fully understood.

What is a defining characteristic of nanoparticles that makes them useful in various applications?

• Their ability to be seen with a light microscope

• Their color

• Their large surface area to volume ratio

• Their large volume

How do nanoparticles enhance the effectiveness of catalysts in chemical reactions?

• By reducing the pressure

• By changing the color of the reaction

• By providing a larger surface area

• By increasing the temperature

In what way are nanoparticles being researched for use in medicine?

• To deliver drugs directly to cells

• To create larger surgical tools

• To replace human organs

• To increase the size of cells

What is a potential concern regarding the use of nanoparticles in sun creams?

• They make the cream too thick

• They could be harmful if absorbed by the body

• They might not protect against UV rays

• They are too expensive to produce

Why is there a call for stricter regulation and labeling of products containing nanoparticles?

• Because they are too visible

• Because their effects on health and the environment are not fully understood

• Because they are too cheap

• Because they are ineffective