AP PGECET 2023 Nano Technology Question Paper with Answer Key

AP PGECET Questions

• 1.

  A number is selected randomly from each of the following two sets:
  {1, 2, 3, 4, 5, 6, 7, 8}, {2, 3, 4, 5, 6, 7, 8, 9}
  What is the probability that the sum of the numbers is 9?

  • \(\frac{1}{8}\)
    
  • \(\frac{1}{16}\)
    
  • \(\frac{3}{32}\)
    
  • \(\frac{7}{64}\)
  View Solution

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• 2.

  Which statement about entropy is incorrect?

  • Entropy is zero at 0 K (Third Law)
    
  • Entropy decreases in spontaneous adiabatic processes
    
  • Entropy production is irreversible
    
  • Entropy measures energy dispersal
    
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• 3.

  Digital signatures provide ________.
   

  • confidentiality
    
  • non-repudiation
    
  • key exchange
    
  • firewall bypass
    
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• 4.

  The change in enthalpy of a system is related to the heat absorbed at a:
  

  • Constant volume
    
  • Constant temperature
    
  • Constant mole fraction
    
  • Constant pressure
    
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• 5.

  The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n-heptane and n-octane into pure compounds, each at 1 atm, is:
  

  • $-2RT \ln 0.5$
    
  • $2RT$
    
  • $-RT \ln 0.5$
    
  • $0.5RT$
    
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• 6.

  The ratio of the ages of A and B is 5:3. After 6 years, their ages will be in the ratio 6:4. What is the current age of A?
  

  • 15 years
    
  • 18 years
    
  • 30 years 
     

  • 25 years
    
  View Solution