- 1. 1.)Richard Feynman’s 1959 lecture “There’s Plenty of Room at the Bottom” explicitly used the term “nanotechnology.”
A) True
B) False
- 2. 2.)The nanoscale is strictly defined as 1–10 nanometers, not 1–100 nanometers.
A) False
B) True
- 3. 3.)Quantum effects are the only reason materials behave differently at the nanoscale.
A) False
B) True
- 4. 4.) Gold nanoparticles appear red/purple because their metallic bonds are completely broken at the nanoscale.
A) True
B) False
- 5. 5.)Scanning Tunneling Microscopes (STMs) can image non-conductive materials directly.
A) False
B) True
- 6. 6.)Graphene is a single layer of carbon atoms arranged in a hexagonal lattice and is a better conductor of electricity than copper at room temperature.
A) True
B) False
- 7. 7.) Targeted drug delivery using nanoparticles eliminates all side effects of chemotherapy.
A) False
B) True
- 8. 8.)Nanofilters for water purification can remove all contaminants, including dissolved gases.
A) False
B) True
- 9. 9.)Self-cleaning surfaces coated with nanoparticles work only by repelling water (hydrophobicity).
A) False
B) True
- 10. 10.Flexible displays use graphene only for their conductive properties, not for flexibility.
A) True
B) False
- 11. 11.)Supercapacitors developed with nanomaterials can store more energy per unit volume than lithium-ion batteries.
A) True
B) False
- 12. 12.)Tissue engineering using nanofibers requires the fibers to be exactly 50 nanometers in diameter to support cell growth.
A) False
B) True
- 13. 13.)Nanoparticle-based sunscreens provide better UV protection because they absorb more UV radiation than traditional zinc oxide/titanium dioxide.
A) False
B) True
- 14. 14.)Carbon nanotubes are stronger than steel in all mechanical properties, including toughness.
A) True
B) False
- 15. 15.)Nanotechnology in food packaging can detect spoilage by changing color in response to specific gases released by decaying food.
A) False
B) True
- 16. 16.)The high surface area-to-volume ratio of nanomaterials makes them less reactive than bulk materials.
A) True
B) False
- 17. 17.)Richard Feynman predicted that individual atoms could be manipulated using “tiny hands” – a concept that later inspired the development of AFMs.
A) False
B) True
- 18. 18.)Nanoscale sensors in smartphones can detect pressure changes by measuring the deformation of nanowires.
A) True
B) False
- 19. 19.)All nanomaterials are synthetic and do not exist in nature.
A) False
B) True
- 20. 20.)Nanotechnology’s economic impact is limited to high-tech industries and does not affect traditional manufacturing.
A) True
B) False
- 21. 21.)Quantum tunneling is the principle that allows STMs to image atoms by measuring electron flow between the tip and sample.
A) True
B) False
- 22. 22.)Antibacterial nanocoatings on hospital equipment kill bacteria only by physically puncturing their cell membranes.
A) True
B) False
- 23. 23.)High-density data storage using nanoscale magnetic particles stores information in individual atoms.
A) True
B) False
- 24. 24.)Nanostructured solar panels absorb more sunlight because they trap light through multiple reflections within the nanomaterials.
A) False
B) True
- 25. 25.Responsible development of nanotechnology requires regulating only synthetic nanomaterials, not natural ones.
A) True
B) False
- 26. 26.)Which of the following was the FIRST technological milestone that allowed direct observation of nanoscale objects?
A) Development of the scanning Tunneling Microscope(STM)
B) Creation of Gold nanoparticles
C) Feynman's 1959 lecture
D) Invention of Graphene
- 27. 27.)The color change of gold nanoparticles from yellow (bulk) to red/purple is primarily due to:
A) Broken covalent bonds
B) Surface plasmon resonance
C) Increased density
D) Quantum Tunneling
- 28. 28.) Which nanomaterial is a single layer of carbon atoms and has a thermal conductivity higher than diamond?
A) Graphene
B) Carbon nanotubes
C) Fullerenes
D) Gold nanoparticles
- 29. 29.)Targeted. drug delivery systems use nanoparticles to carry medication to diseased cells. What is the MAIN mechanism that allows them to target specific cells?
A) Binding to specific receptors on the cell surface
B) Magnetic attraction to cell nuclei
C) Passive diffusion through all cell membranes
D) Electrical charge matching with cell cytoplasm
- 30. 30.)Nanofilters for water purification are most effective at removing which of the following?
A) Dissolved carbon dioxide
B) Dissolved salt
C) Bacteria and heavy metals
D) Pure water molecules
- 31. 31.)Self-cleaning glass coated with titanium dioxide nanoparticles works by:
A) Repelling all liquids
B) Creating a rough surface that prevents dirt from adhering
C) Photocatalysis that breaks down dirt when exposed to UV light
D) Releasing cleaning chemicals over time
- 32. 32.)Which of the following statements about supercapacitors vs. lithium-ion batteries is CORRECT?
A) Lithium-ion batteries have higher power density but charge slower.
B) Supercapacitors have higher power density and charge faster.
C) Supercapacitors have higher energy density but charge slower.
D) Lithium-ion batteries have lower energy density but last longer.
- 33. 33.) Tissue engineering uses nanofibers to create scaffolds for cell growth. What property of nanofibers is MOST critical for this application?
A) High electrical conductivity
B) Exact diameter of 10 nm
C) Ability to dissolve in water
D) Similarity in structure to natural extracellular matrix
- 34. 34.) Nanoparticle-based sunscreens avoid white residue because:
A) They are absorbed into the skin immediately
B) They are completely transparent to all light
C) They reflect less visible light than traditional formulations
D) They break down UV light into visible light
- 35. 35.)Carbon nanotubes are classified based on their structure. Which type has the highest electrical conductivity?
A) Zigzag nanotubes
B) Armchair nanotubes
C) All types have the same conductivity
D) Chiral nanotubes
- 36. 36.)Which of the following everyday products does NOT typically use nanotechnology?
A) Self-cleaning clothes
B) Traditional wooden furniture
C) High-performance sports equipment
D) Food packaging with spoilage sensors
- 37. 37.) The high surface area-to-volume ratio of nanomaterials leads to:
A) Decreased reactivity
B) No change in reactivity
C) Increased reactivity
D) Increased stability at high temperatures
- 38. 38.)Richard Feynman’s 1959 lecture proposed that we could:
A) Develop computers smaller than a human cell
B) Use nanotechnology to cure all diseases
C) Create nanomaterials using solar energy
D) Manipulate individual atoms and molecules to build structures
- 39. 39.)Which nanoscale sensor technology is used in smartphones to detect motion?
A) Carbon nanotube gas sensors
B) Graphene light sensors
C) Nanoparticle magnetic sensors (MEMS/NEMS)
D) Nanowire pressure sensors
- 40. 40.)Natural nanomaterials include all of the following EXCEPT:
A) Virus particles
B) Volcanic ash particles
C) Sea spray aerosols
D) Synthetic graphene
- 41. 41.)Nanotechnology’s impact on the energy sector includes all of the following EXCEPT:
A) High-efficiency solar panels
B) Lightweight materials for electric vehicles
C) Increased fossil fuel extraction
D) High-efficiency solar panels
- 42. 42.) Quantum effects become significant at the nanoscale because:
A) The material’s mass decreases drastically
B) Temperature has no effect on nanoscale objects
C) Atoms are no longer held together by bonds
D) The wavelength of electrons is comparable to the size of the material
- 43. 43.)Antibacterial nanocoatings on medical devices work by all of the following mechanisms EXCEPT:
A) Releasing silver ions that kill bacteria
B) Puncturing bacterial cell membranes
C) Increasing the temperature of the device to kill bacteria
D) Preventing bacteria from attaching to the surface
- 44. 44.)High-density data storage using nanoscale magnetic particles achieves higher storage capacity by:
A) Using light instead of magnetism to store data
B) Increasing the size of the storage device
C) Storing one bit per atom
D) Using smaller magnetic domains than traditional storage
- 45. 45.) Which of the following is a key challenge in responsible nanotechnology development?
A) Ensuring that nanomaterials do not enter the environment
B) Preventing all research on nanomaterials
C) Banning the use of nanomaterials in consumer products
D) Assessing the long-term health and environmental risks of nanomaterials
- 46. 46.)Nanostructured materials used in aerospace engineering are prized for their:
A) Low weight and high strength
B) Low reactivity and high density
C) High weight and low strength
D) High conductivity and low durability
- 47. 47.)The Atomic Force Microscope (AFM) differs from the STM in that it:
A) Can only image conductive materials
B) Uses a physical tip to “feel” the sample surface
C) Was invented before the STM
D) Relies on quantum tunneling to detect atoms
- 48. 48.) Which of the following applications of nanotechnology in medicine is still in the experimental stage (not widely used clinically)?
A) Targeted drug delivery for cancer
B) Nano-biosensors for disease diagnosis
C) Antibacterial nanocoatings on equipment
D) Tissue engineering to grow entire organs
- 49. 49.) The term “nanotechnology” was first coined by:
A) Andre Geim (discoverer of graphene)
B) K. Eric Drexler
C) Gerd Binnig (inventor of STM)
D) Richard Feynman
- 50. 50.)Which of the following properties is not typically enhanced in nanoscale materials compared to bulk materials?
A) Reactivity (in metal nanoparticles)
B) Density (in most nanomaterials)
C) Tensile strength (in carbon nanotubes)
D) Electrical conductivity (in graphene)
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