Which of the following is a nanoparticle?
A particle with a diameter of 75 nanometres
A particle with a diameter of 500 nanometres
A particle with a diameter of 0.01 nanometres
What is the name of the nanoparticle which has the formula C60?
Buckminsterfullerene
Carbon nanotube
Graphene
Which of the following statements about nanoparticles is true?
They have a small surface area to volume ratio
They have a constant surface area to volume ratio
They have a large surface area to volume ratio
What is the surface area of a cube which has a length of 3 nm?
9 nm2
27 nm2
54 nm2
What is the surface area to volume ratio of a cube which has a length of 2 nm.
8/24 = 0.3
24/8 = 3
48/8 = 6
Which of the following cubes has the highest surface area to volume ratio?
A 1 nm cube
A 15 nm cube
A 75 nm cube
Which of the following is a use for zinc oxide nanoparticles?
As a catalyst
To reinforce carbon fibre in sporting equipment
In sunscreens
What property of nanoparticle silver would make it useful in surgical wound dressings?
It keeps out air
It destroys bacteria
It acts as a catalyst
Why do nanoparticles make effective catalysts?
They catalyse reactions more efficiently
They are cheaper than traditional catalysts
They are easy to find in natural sources
Why are some people concerned about the use of nanoparticles?
They are contributing to global warming
Uncertainty about their effects on human health
They are using up finite resources of oil