List of top Questions asked in CUET (PG)

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.
Choose the correct answer from the options given below
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.
Choose the correct answer from the options given below:
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 (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:
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
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
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.
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:
The Wiedemann-Franz law is
When in Kronig-Penney Potential, P tends to infinity, the energy spectrum is given by
The effective mass ($m^*$) of an electron when it moves 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:
The resistivity of copper metal is \(1.7 \times 10^{-8} \, \Omega \, \text{m}\) and the atomic density of copper is \(8.5 \times 10^{28} \, \text{atoms/m}^3\). The collision time \(\tau\) for electrons in copper is:
The energy gap between the top of the valence band and bottom of the conduction band is called the energy band gap \((E_g)\). Depending upon the materials, the gap can be:
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:
Assume a solid of $N$ atoms, each vibrating about its mean position. An oscillation in one dimension has average energy $\frac{1}{2}k_BT$. In 3 dimensions, the average energy is:
If the Madelung Constant of NaCl is 1.748, the equilibrium bond distance is \(2.018 \, \text{\AA}\), and the repulsion exponent is \(0.32 \, \text{\AA}\), the cohesive energy of NaCl is:
The kinetic energy of a 3-dimensional gas of \(N\) free electrons at 0 K is:
The probability that a state is filled at the conduction edge \((E_c)\) is precisely equal to the probability that a state is empty at the valence band edge \((E_v)\). The Fermi level is located at:
A pure silicon crystal has \(5 \times 10^{28} \, \text{atoms/m}^3\). It is doped with \(1 \, \text{ppm}\) concentration of pentavalent As. The number of holes is: