AP PGECET 2023 Electrical Engineering Question Paper with Answer Key

AP PGECET Questions

• 1.

  The entropy of single crystalline Silicon at absolute zero will be:
  

  • 2
    
  • 1
    
  • 0
    
  • 10
    
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• 2.

  The minimum amount of work required to operate a refrigerator which removes 1000 Cal heat at $0^\circ$C and rejects at $50^\circ$C will be:
  

  • 170 Cal
    
  • 120 Cal
    
  • 150 Cal
    
  • 183.15 Cal
    
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• 3.

  1 mole of Argon gas is heated at constant pressure from 200 K to 600 K.
  If \( C_p = 4\ \text{cal} \cdot \text{deg}^{-1} \cdot \text{mol}^{-1} \), then the change in entropy will be:
  (Given \( \ln 3 = 1.09 \))
  

  • 4.36 Cal.deg$^{-1}$mol$^{-1}$
    
  • 2.76 Cal.deg$^{-1}$mol$^{-1}$
    
  • 3.34 Cal.deg$^{-1}$mol$^{-1}$
    
  • 5.39 Cal.deg$^{-1}$mol$^{-1}$
    
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• 4.

  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?

  • \(\frac{1}{8}\)
    
  • \(\frac{1}{16}\)
    
  • \(\frac{3}{32}\)
    
  • \(\frac{7}{64}\)
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• 5.

  Why is the equilibrium constant (K) temperature-dependent?
  

  • Because $\Delta G^\circ$ depends on T
    
  • Because pressure affects K
    
  • Because entropy is temperature-independent
    
  • Because fugacity coefficients change with T
    
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• 6.

  Design an approach to estimate the activity coefficient of a component in a non-ideal liquid mixture:
  

  • Use the ideal gas law
    
  • Apply the Gibbs-Duhem equation with experimental data
    
  • Assume it equals mole fraction
    
  • Use the Second Law only
    
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