TS PGECET 2021 Nano Technology Question Paper with Answer Key PDF (August 14 - Afternoon Session)

TS PGECET Questions

• 1.

  A bag contains 3 red and 2 blue balls. Two balls are drawn without replacement. What is the probability that both are red?

  • $\frac{3}{10}$
    
  • $\frac{1}{5}$
    
  • $\frac{2}{5}$
    
  • $\frac{1}{10}$
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• 2.

  Which of the following correctly describes the TCP/IP model?

  • A 4-layer model: Application, Transport, Internet, Network Access
    
  • A 7-layer model including Physical and Data Link layers
    
  • A 5-layer model including Session and Presentation layers
    
  • A 3-layer model: Application, Transport, Network
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• 3.

  The quantum confinement effect in nanoparticles is observed when:

  • The particle size is larger than 1 micron
    
  • The particle size is smaller than the electron’s de Broglie wavelength
    
  • The particle is in a vacuum
    
  • The temperature is near absolute zero
    
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• 4.

  Which one of the following gases is not a greenhouse gas?

  • Methane (CH$_4$)
    
  • Carbon dioxide (CO$_2$)
    
  • Nitrous oxide (N$_2$O)
    
  • Oxygen (O$_2$)
    
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• 5.

  Which of the following techniques is most commonly used for imaging at the nanoscale?

  • Optical microscopy
    
  • Scanning Electron Microscopy (SEM)
    
  • X-ray diffraction
    
  • Transmission Electron Microscopy (TEM)
    
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• 6.

  The top-down approach in nanofabrication refers to:

  • Building structures atom-by-atom
    
  • Assembling molecules using biological processes
    
  • Carving or shaping materials into nanoscale structures
    
  • Using chemical vapor deposition for coating
    
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