WorksheetsNano Scle and nano chemistry chemistry
Total questions: 24
Worksheet time: 21mins
convert : 0.002 μm = .................mm
2×10+6
2×10−9
2×10−6
none
convert : 2 cm = ....... nm
2×10+7
2×10−6
2×10+6
2×10−7
find if the following dimensions are for nanomaterial or not :
l = 20000 μm
w =20x10−6mm
h=2x103 nm
one dimension
two dimensions
three dimensions
not a Nano material
GR: Nano substances have adverse health effects
Because their tiny sizes make them able to attach to air, so they can penetrate the cells of living organisms
Because their large sizes make them able to attach to air, so they can penetrate the cells of living organisms
Because their tiny sizes make them unable to attach to air, so they can't penetrate the cells of living organisms
none
they are good conductors of heat and electricity, they can be used as biological sensors
nano shell
Nanowires
carbon nanotubes
none
they can be used for carrying medicine inside human body (which decreases side effects)
carbon nanotubes
Bucky balls
Nanowires
thin films
GR:- The extraordinary properties of nanomaterials
Due to the increase of the ratio between the surface area and weight and the no. of atoms on the surface.
Due to the increase of the ratio between the density and volume and the no. of atoms on the surface.
Due to the decrease of the ratio between the surface area and volume and the no. of atoms on the surface.
Due to the increase of the ratio between the surface area and volume and the no. of atoms on the surface.
A unit which equals one billionth meter
giga meter
micrometer
Nanometer
megameter
The behavior of nanoparticles are linked with their tiny sizes because:-
The ratio between surface area and volume is very great if compared to bigger sizes
The ratio between surface area and volume is smaller if compared to smaller sizes
The no. of atoms on the particles surface is much greater
none
nanotechnology is important because:-
It needs special devices to deal with it
Its value ranges from 1 to 100 nm special properties
It has special properties
Nanomaterials industry require
0.01 nanometer is a dimension for .......
one dimension nanomaterials
two dimension nanomaterials
three dimension nanomaterials
not a nanomaterial
…….. are from one-dimensional nanomaterials
Carbon nanotubes
Thin films
Bucky balls
Nanoshells
What is nanotechnology?
Study and manipulation of technology that is micro sized
Study and manipulation of matter that is small but can still be seen by the human eyes
Study and manipulation of matter at a scale of 1-100 nano meters
Study and manipulation of matter that moves at a speed measured in nano seconds
Greek word Nanos means
millionth fraction of a unit
billionth fraction of a unit
trillionth fraction of a unit
Why the properties of nanomaterials are different significantly compared to bulk materials?
Increased relative surface area
Decreased relative surface area
Increased lattice parameters
Lower down the melting temperature
…….. are from one-dimensional nanomaterials
Carbon nanotubes
Thin films
Bucky balls
Nanoshells
0.01 nanometer is a dimension for .......
one dimension nanomaterials
two dimension nanomaterials
three dimension nanomaterials
not a nanomaterial
nanotechnology is important because:-
It needs special devices to deal with it
Its value ranges from 1 to 100 nm special properties
It has special properties
Nanomaterials industry require
The behavior of nanoparticles are linked with their tiny sizes because:-
The ratio between surface area and volume is very great if compared to bigger sizes
The ratio between surface area and volume is smaller if compared to smaller sizes
The no. of atoms on the particles surface is much greater
none
they can be used for carrying medicine inside human body (which decreases side effects)
carbon nanotubes
Bucky balls
Nanowires
thin films
they are good conductors of heat and electricity, they can be used as biological sensors
nano shell
Nanowires
carbon nanotubes
none
GR: Nano substances have adverse health effects
Because their tiny sizes make them able to attach to air, so they can penetrate the cells of living organisms
Because their large sizes make them able to attach to air, so they can penetrate the cells of living organisms
Because their tiny sizes make them unable to attach to air, so they can't penetrate the cells of living organisms
none
Which of the following amounts is larger?
10-3
10-2
10-6
10-8
