Solapur University M.Sc Nano Technology (Semester-I) Paper on Nano Materials Fabrication March 2019
| Sr. No. | Question |
| 1 | The wavelength of laser used in photoblation is approximately _________
(a) 600 nm (b) 500 nm (c) 400 nm (d) 200 nm |
| 2 | In March 1995 __________were the first to report the use of a laser to ablate a block of pure graphite.
(a) Guo (b) Madam Curie (c) Sir Isaac Newton (d) Einstein |
| 3 | A method for the synthesis of carbon nanotubes where using _________
(a) Inert gas (b) Helium gas (c) Methane gas (d) Normal gas |
| 4 | The synthesis of materials by ball milling of powders was first developed by __________
(a) Newton (b) John Benjamin (c) Fleming (d) Maxwell |
| 5 | Laser ablation refers to removing material with a _______
(a) Pulsed laser (b) Mechanical (c) Physical (d) Chemical |
| 6 | Direct liquid injection (DLICVD) in which the precursors are in _______
(a) Solid form (b) Liquid form (c) Gas form (d) Gas/liquid form |
| 7 | Polycrystalline silicon is deposited from ________
(a) Trichlorosilane (b) Tetrachlorosilane (c) Monochlorosilane (d) Microchlorosilane |
| 8 | Nanotubes have ______on the nanoscale .
(a) Three dimensions (b) Two dimensions (c) Four dimensions (d) Six dimensions |
| 9 | Spray pyrolysis is a process in which a thin film is deposited by ______ a solution on a heated surface.
(a) Spraying (b) Drying (c) Freezing (d) Air drying |
| 10 | The gas phase are based on ________
(a) Homogeneous nucleation (b) Heterogeneous nucleation (c) Non-homogeneous nucleation (d) All of these |
| 11 | Spontaneousemission in which atoms are transitions from an _______
(a) Excited energy state to a lower energy state (b) Lower energy state to excited energy state (c) Excited energy state to excited energy state (d) Lower energy state to a lower energy state |
| 12 | Active efflux is a mechanism responsible for ________
(a) Not -moving compounds (b) Standing compounds (c) Moving compounds (d) Stationary compounds |
| 13 | The particles in nano-powders are _______ the wavelength of visible light.
(a) Smaller than (b) Greater than (c) Equal (d) Very large |
| Published on 22nd Sept 2021 | |
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