Question 1

Who first used the term Nanotechnology?
A)Richard Feymann
B)Norio Taniguichi
C)Eric Drexler
D)Sumio Lijima

Accepted Answer

Norio Taniguchi was the first to use the term "nanotechnology" in 1974, to describe precision machining at the nanometer level.

Question 2

How many oxygen atoms lined up in a row would fit in a one nanometer space?
A)None
B)One
C)Seven
D)Seventy

Accepted Answer

The diameter of an oxygen atom is approximately 0.12 nanometers. Therefore, in a one nanometer space, about $ \frac{1}{0.12} \approx 8.33 $ oxygen atoms could fit. However, since we can't have a fraction of an atom in a physical sense, the closest whole number that fits without exceeding the limit is seven.

Question 3

Which of these statements is NOT true?
A)Gold at the nanoscale is red
B)Copper at the nanoscale is transparent
C)Silicon at the nanoscale is an insulator
D)Aluminium at the nanoscale is highly combustible

Accepted Answer

Silicon at the nanoscale does not become an insulator; its electrical properties can change, but it doesn't inherently become an insulator. Gold nanoparticles appear red due to surface plasmon resonance, copper nanoparticles can appear transparent under certain conditions, and nanoscale aluminum is highly combustible due to its increased surface area to volume ratio.

Question 4

Which of the following is an example of top-down approach for the preparation of nanomaterials?
A)Gas phase agglomeration
B)Molecular self-assembly
C)Mechanical grinding
D)Molecular beam epitaxy

Accepted Answer

Mechanical grinding is a top-down approach where larger particles are broken down into nanoscale particles.

Question 5

Which of the following is an example of bottom-up approach for the preparation of nanomaterials?
A)Etching
B)Dip pen nano-lithography
C)Lithography
D)Erosion

Accepted Answer

Dip pen nano-lithography is a bottom-up approach where materials are deposited onto a substrate to build structures from the molecular level.

Question 6

What is the general name for the class of structures made of rolled up carbon lattices?
A)Nanorods
B)Nanotubes
C)Nanosheets
D)Fullerods

Accepted Answer

Nanotubes are the class of structures made of rolled up carbon lattices, specifically known as carbon nanotubes. These cylindrical structures have novel properties that make them potentially useful in many applications in nanotechnology, electronics, optics, and other fields of materials science.

Question 7

What ratio decides the efficiency of nano-substances?
A)Weight/Volume
B)Surface area/Volume
C)Volume/Weight
D)Pressure/Volume

Accepted Answer

The efficiency of nano-substances is largely determined by their surface area to volume ratio. A higher surface area to volume ratio allows for more interaction with the surrounding environment, making the substance more reactive or effective in its application.

Question 8

"There is plenty of room at the bottom". This was stated by
A)Eric Drexler
B)Harold Croto
C)Richard Feymann
D)Richard Smalley

Accepted Answer

Richard Feynman is credited with the concept of nanotechnology in his famous lecture "There's Plenty of Room at the Bottom," where he discussed the possibilities of manipulating and controlling things on a small scale.

Question 9

____________ is the field in which the nanoparticles are used with silica coated iron oxide
A)Magnetic applications
B)Electronics
C)Medical diagnosis
D)Structural and mechanical materials

Accepted Answer

Nanoparticles, such as silica-coated iron oxide, are extensively used in the field of medical diagnosis. This is because they can be manipulated using magnetic fields, making them highly useful for imaging and targeting specific areas within the body for diagnostic purposes.

Question 10

Coating the nano crystals with the ceramics is carried that leads to__________ .
A)Corrosion
B)Corrosion resistant
C)wear and tear
D)Soft

Accepted Answer

Coating nano crystals with ceramics enhances their durability by making them resistant to corrosion. This process protects the underlying material from chemical and environmental degradation.

Question 11

Which of the ceramic components are easier through nano structuring?
A)Lubrication
B)Coating
C)Fabrication
D)Wear

Accepted Answer

The answer of Which of the ceramic components are easier...

Question 12

How is nanotechnology used in the medical community?
A)Testing and diagnosis
B)Tissue engineering
C)Drug delivery
D)All the above

Accepted Answer

Nanotechnology is utilized across various aspects of medicine, including testing and diagnosis (e.g., nanoscale biosensors), tissue engineering (e.g., scaffolds for tissue regeneration), and drug delivery (e.g., nanoparticles for targeted therapy), making all the options correct.

Question 13

Nanoscience can be studied with the help of ___________ .
A)Quantum mechanics
B)Newtonian mechanics
C)Macro-dynamics
D)Geophysics

Accepted Answer

Nanoscience involves the study of phenomena and manipulation of materials at atomic, molecular, and macromolecular scales, where properties differ significantly from those at a larger scale. Quantum mechanics is the branch of physics that deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave-particle duality, the uncertainty principle, and quantum entanglement. These principles are fundamental to understanding and predicting behaviors and interactions at the nanoscale, making quantum mechanics essential for the study of nanoscience.

Question 14

The compressive strength of a nanotube ________ its tensile strength.
A)is less than
B)is greater than
C)is equal to
D)may be greater than

Accepted Answer

Nanotubes typically have very high tensile strength, but their compressive strength is generally lower due to their tendency to buckle under compression.

Question 15

The nanomaterials are used in the light emitted electron luminescent devices.
A)True
B)False
C)none
D)all

Accepted Answer

Nanomaterials are indeed used in light-emitting electro-luminescent devices due to their unique optical properties, which can be finely tuned by adjusting their size, shape, and composition.

Question 16

Gel electrophoresis separates nucleic acid molecules based on ____________
A)charge on molecules
B)size of the molecules
C)nature of the molecules i.e. whether DNA or RNA
D)chemical properties of the nucleic acids

Accepted Answer

Gel electrophoresis separates nucleic acid molecules primarily based on the size of the molecules, as smaller fragments move faster and farther through the gel matrix than larger ones.

Question 17

Which of the following is a characteristic of microspheres?
A)Free flowing powders
B)Aqueous solutions
C)Control drug release by partitioning the drug from the oil
D)Administration of emulsions

Accepted Answer

The answer of Which of the following is a characteristic...

Question 18

What are the size of Microspheres ?
A)> 200 ?m
B)< 200 ?m
C)Both a and b
D)None

Accepted Answer

Microspheres are typically defined as spherical particles with sizes less than 200 micrometers (µm).

Question 19

What are the shape of the Microparticulates ?
A)Square
B)Triangle
C)Spherical
D)None

Accepted Answer

Microparticulates are typically spherical in shape, which allows for uniform distribution and stability in various applications.

Question 20

Synonyms of the Microspheres………
A)Beads
B)Capsules
C)All
D)None

Accepted Answer

Microspheres can be described as both beads and capsules, depending on their application and structure, making all given options synonyms.

Quiz 4: Nanotechnology and Microspheres

Who first used the term Nanotechnology?

How many oxygen atoms lined up in a row would fit in a one nanometer space?

Which of these statements is NOT true?

Which of the following is an example of top-down approach for the preparation of nanomaterials?

Which of the following is an example of bottom-up approach for the preparation of nanomaterials?

What is the general name for the class of structures made of rolled up carbon lattices?

What ratio decides the efficiency of nano-substances?

"There is plenty of room at the bottom". This was stated by

____________ is the field in which the nanoparticles are used with silica coated iron oxide

Coating the nano crystals with the ceramics is carried that leads to__________ .

Which of the ceramic components are easier through nano structuring?

How is nanotechnology used in the medical community?

Nanoscience can be studied with the help of ___________ .

The compressive strength of a nanotube ________ its tensile strength.

The nanomaterials are used in the light emitted electron luminescent devices.

Gel electrophoresis separates nucleic acid molecules based on ____________

Which of the following is a characteristic of microspheres?

What are the size of Microspheres ?

What are the shape of the Microparticulates ?

Synonyms of the Microspheres………