List of top Material Science and Technology Questions asked in Common University Entrance Test

Surface Area to Volume Ratio
The surface area to volume ratio of a cube with side 1 unit (R) and a cube with side 10 units (R) is:
(A) R = 1/100 R
(B) R = 1/50 R
(C) R = 1/10 R
(D) R = R
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To be classified as nanoscale, objects must have dimensions of the order of:
(A) $1 \times 10^{-9} \text{ m}$
(B) $2 \times 10^{-9} \text{ m}$
(C) $3 \times 10^{-9} \text{ m}$
(D)$4 \times 10^{-9} \text{ m}$
Choose the correct answer from the options given below:
Nanotechnology and Environment
Which of the following statements are true?
(A) Nanoparticles are used in wastewater treatment.
(B) Nanomaterials detoxify contaminants like metals.
(C) Nanosensors guard the environment.
(D) Nanomaterials fail to reduce the carbon footprint.
Choose the correct answer from the options given below:
Nanotechnology Transformations
Which statements are true?
(A) Opaque substances become transparent at nano-level.
(B) Insulators behave as semiconductors at nano-level.
(C) Products become stronger and durable at nano-level.
(D) Nanomaterials change semiconductors into dielectrics.
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Nanotechnology in Construction
Which of the following statements are true?
(A) Nanomaterials act as binding agents in cement.
(B) Nano-engineering uses Vacuum Insulation Panels and Phase Change Panels for thermal insulation.
(C) Nanomaterials strengthen and improve mud houses in villages.
(D) Nanomaterials enhance construction material durability and workability.
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Quantum Confinement
Which of the following is true regarding quantum confinement?
(A) Energy gap is proportional to the inverse square root of size.
(B) Energy gap is proportional to the inverse of size.
(C) Energy gap is proportional to the square of size.
(D) Energy gap is proportional to the inverse of the square of size.
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Solar Cells and Nanotechnology Applications
Which of the following statements are true regarding nanotechnology in solar cells?
(A) Solar radiations are absorbed more effectively by photovoltaic panels with silicon nanoparticles.
(B) Nanomaterials on rooftops can harvest solar energy for electricity.
(C) Quantum dot technologies are being used to maximize solar energy generation.
(D) Nanomaterials reduce reflectivity, guiding radiation into cells to maximize efficiency.
Choose the correct answer from the options given below:
Nanomaterial Coatings on Substances
Which of the following statements are true?
(A) Surface coatings enhance hardness and corrosion resistance.
(B) Nanocoatings repel water and dirt, making surfaces self-cleaning.
(C) Nanoparticles on surfaces can change the color of products.
(D) Coated surfaces can be anti-viral, anti-fog, and anti-bacterial.
Choose the correct answer from the options given below:
Nanomaterials in Food Technology
Which statements are true?
(A) Used for packing
(B) Nanosensors for pathogens and bacteria
(C) Enhancing flavor by direct addition
(D) Increased shelf life
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Match List-I with List-II
List-I (Name of Items)List-II (Approximate Size)
(A) Diameter of Human Hair(I) 1-10 nm
(B) Size of Quantum Dot(II) 5 × 10-5 m
(C) Width of M CNT(III) 50-100 nm
(D) Size of Virus(IV) 2-4 nm
Choose the correct answer from the options given below:
Match List-I with List-II
List-I (Method of Preparation)List-II (Approach)
(A) Sol-gel Synthesis(I) Top down
(B) Ball milling(II) Bottom up
(C) Laser ablation(III) Bottom up
(D) Nano-Lithography(IV) Top down
Choose the correct answer from the options given below:
Nanotechnology in Medical Science
Which of the following are true?
(A) Nanomaterials used in Medicines
(B) Diagnostics
(C) Cell Therapy
(D) Surgery by CNTs
Choose the correct answer from the following.
Match List-I with List-II
List-I (Concept)List-II (Author)
(A) Concept of Carbon Nanotubes(I) Richard Feynman
(B) Concept of Nanotechnology(II) Sumio Iijima
(C) Discovery of Bucky ball (C60)(III) Andero Geim
(D) Discovery of Graphene(IV) Richard Smalley et al
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Match List-I with List-II
List-I (Size of Things)List-II (Approximate Size)
(A) Size of atom(I) 2.5 nm
(B) Size of Bucky ball (C60)(II) 0.1 nm
(C) Size of CNT(III) 1 nm
(D) Size of DNA(IV) 2 nm
Choose the correct answer from the options given below:
Match List-I with List-II
List-I (Dimensions)List-II (Materials shape)
(A) Quantum dot(I) 3-dimensional
(B) Quantum Wire(II) 2-dimensional
(C) Quantum Well(III) 1-dimensional
(D) Micro-materials(IV) 0-dimensional
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When in Kronig-Penney Potential, P tends to infinity, the energy spectrum is given by
The Wiedemann-Franz law is
The effective mass ($m^*$) of an electron when it moves is
Powder diffraction experiments on samples of lead with X-rays of wavelength 1.44 $\text{\AA}$ produce (220) reflection at an angle of $32^\circ$. The lattice parameter of Lead is:
A water molecule has three atoms (two hydrogen and one oxygen) with total energy $9RT$ ($3 \times 3k_B T N_A = 9RT$). Its specific heat is:
For what distance is ray optics a good approximation when aperture is 3mm wide and wavelength is 500nm?
The Debye temperature $\Theta_D$ for Diamond is 1850K. The Debye frequency is:
Metallic sodium crystallizes in a BCC cubic form with a cube length of \(4.25 \times 10^{-10} \, \text{m}\). The concentration of conduction electrons is:
What is the stress developed when a steel rod of radius 10 mm and length 1.0 m is stretched by a 100 kN force?
Two thigh bones (femurs) of $10 \ cm^2$ area support a 40 kg body. Average pressure is: