Q.1 What is the typical size range of nanoparticles in nanotechnology?
1-100 nm
100-500 nm
1-10 µm
1-10 mm
Explanation - Nanoparticles are defined as particles with at least one dimension in the range of 1-100 nanometers.
Correct answer is: 1-100 nm
Q.2 Which of the following materials is commonly used in carbon nanotubes?
Graphene
Silicon
Aluminium
Iron Oxide
Explanation - Carbon nanotubes are made of rolled-up sheets of graphene, a single layer of carbon atoms arranged in a hexagonal lattice.
Correct answer is: Graphene
Q.3 What property of nanomaterials often differs significantly from their bulk counterpart?
Color
Density
Electrical Conductivity
All of the above
Explanation - Nanomaterials often exhibit different optical, electrical, and mechanical properties due to quantum effects and high surface area to volume ratio.
Correct answer is: All of the above
Q.4 Which nanomaterial is known for its exceptional strength and flexibility?
Carbon Nanotubes
Gold Nanoparticles
Silicon Nanowires
Titanium Dioxide Nanoparticles
Explanation - Carbon nanotubes have a high tensile strength and remarkable flexibility, making them useful in advanced materials and electronics.
Correct answer is: Carbon Nanotubes
Q.5 Quantum dots are primarily used in which application?
Solar Cells
Drug Delivery
Paints
Structural Materials
Explanation - Quantum dots have tunable optical properties and are often used in solar cells, displays, and biomedical imaging.
Correct answer is: Solar Cells
Q.6 Which technique is widely used to characterize nanomaterials?
Scanning Electron Microscopy (SEM)
X-Ray Diffraction (XRD)
Atomic Force Microscopy (AFM)
All of the above
Explanation - SEM, XRD, and AFM are commonly used techniques for analyzing the structure, morphology, and surface properties of nanomaterials.
Correct answer is: All of the above
Q.7 Which type of nanomaterial is primarily used for targeted drug delivery?
Liposomes
Carbon Nanotubes
Gold Nanoparticles
Silica Nanoparticles
Explanation - Liposomes are spherical vesicles that can encapsulate drugs and target specific cells, reducing side effects.
Correct answer is: Liposomes
Q.8 Which property makes graphene an excellent material for electronic applications?
High Electrical Conductivity
Low Density
High Melting Point
Biodegradability
Explanation - Graphene has exceptional electrical conductivity due to its delocalized electrons, making it ideal for electronic devices.
Correct answer is: High Electrical Conductivity
Q.9 What is the main advantage of using nanocomposites?
Enhanced Mechanical Properties
Reduced Cost
Ease of Production
Biodegradability
Explanation - Nanocomposites combine nanoscale fillers with a matrix material, resulting in improved strength, durability, and thermal stability.
Correct answer is: Enhanced Mechanical Properties
Q.10 Which of the following is a common application of silver nanoparticles?
Antimicrobial Coatings
Structural Engineering
Optical Lenses
Battery Electrodes
Explanation - Silver nanoparticles are widely used for their antimicrobial properties in medical devices, textiles, and coatings.
Correct answer is: Antimicrobial Coatings
Q.11 Nanotechnology can be applied in agriculture primarily for:
Pesticide Delivery
Crop Monitoring
Soil Remediation
All of the above
Explanation - Nanotechnology aids agriculture by enabling precision pesticide delivery, monitoring crops using nanosensors, and remediating contaminated soils.
Correct answer is: All of the above
Q.12 Which method is commonly used to synthesize metallic nanoparticles?
Chemical Reduction
Mechanical Milling
Electrospinning
Chemical Vapor Deposition
Explanation - Chemical reduction involves reducing metal salts into metallic nanoparticles using reducing agents, a widely used synthesis method.
Correct answer is: Chemical Reduction
Q.13 What is the main challenge in using nanomaterials in consumer products?
Toxicity
High Cost
Scalability
All of the above
Explanation - Nanomaterials face challenges including potential toxicity, high production costs, and difficulties in scaling up manufacturing.
Correct answer is: All of the above
Q.14 Which type of carbon structure is composed of a single layer of atoms arranged in a hexagonal lattice?
Graphene
Fullerene
Carbon Nanotube
Diamond
Explanation - Graphene is a single layer of carbon atoms in a hexagonal lattice, providing remarkable electrical and mechanical properties.
Correct answer is: Graphene
Q.15 What property of nanomaterials is exploited in sunscreen formulations?
UV Absorption
Antimicrobial Activity
Electrical Conductivity
Magnetism
Explanation - Nanoparticles like titanium dioxide and zinc oxide absorb UV light effectively, making them ideal for sunscreens.
Correct answer is: UV Absorption
Q.16 Which technique is most suitable for imaging individual nanoparticles?
Transmission Electron Microscopy (TEM)
Optical Microscopy
X-Ray Diffraction
Infrared Spectroscopy
Explanation - TEM provides high-resolution images at the nanoscale, allowing visualization of individual nanoparticles.
Correct answer is: Transmission Electron Microscopy (TEM)
Q.17 Which type of nanomaterial can change color based on particle size due to quantum effects?
Quantum Dots
Graphene
Nanotubes
Nanofibers
Explanation - Quantum dots exhibit size-dependent optical properties, changing color as their size varies due to quantum confinement.
Correct answer is: Quantum Dots
Q.18 What is a major application of magnetic nanoparticles in medicine?
Targeted Drug Delivery
Bone Reinforcement
Gene Editing
Prosthetics
Explanation - Magnetic nanoparticles can be guided using magnetic fields to deliver drugs precisely to targeted tissues.
Correct answer is: Targeted Drug Delivery
Q.19 Which property is characteristic of superhydrophobic nanomaterials?
Extreme Water Repellency
High Electrical Conductivity
Magnetism
Biodegradability
Explanation - Superhydrophobic surfaces repel water strongly, often due to nanoscale surface roughness and low surface energy coatings.
Correct answer is: Extreme Water Repellency
Q.20 Which nanomaterial is frequently used in flexible electronics?
Graphene
Titanium Dioxide
Silver Nanoparticles
Zinc Oxide
Explanation - Graphene is highly conductive, flexible, and thin, making it suitable for flexible and wearable electronic devices.
Correct answer is: Graphene
Q.21 What advantage do nanostructured catalysts offer over conventional catalysts?
Higher Surface Area
Lower Reactivity
Larger Particle Size
None of the above
Explanation - Nanostructured catalysts have increased surface area, enhancing their chemical reactivity and efficiency.
Correct answer is: Higher Surface Area
Q.22 Which nanomaterial is used in water purification due to its high adsorption capacity?
Carbon Nanotubes
Gold Nanoparticles
Quantum Dots
Silica Nanoparticles
Explanation - Carbon nanotubes can adsorb contaminants from water efficiently, making them suitable for water purification.
Correct answer is: Carbon Nanotubes
Q.23 Which of the following is a limitation in the commercialization of nanomaterials?
Health Risks
High Manufacturing Costs
Environmental Impact
All of the above
Explanation - Nanomaterials may pose health risks, high production costs, and environmental concerns, limiting their large-scale commercialization.
Correct answer is: All of the above
Q.24 Which nanomaterial is known for its piezoelectric properties and is used in sensors?
Zinc Oxide Nanowires
Graphene
Titanium Dioxide
Carbon Nanotubes
Explanation - Zinc oxide nanowires exhibit piezoelectricity, generating electric charge under mechanical stress, suitable for sensors and energy harvesting.
Correct answer is: Zinc Oxide Nanowires