AP PGECET 2026 Civil Engineering Question Paper: Download Answer Key with Solutions

AP PGECET Questions

• 1.

  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
    
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• 2.

  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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• 3.

  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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• 4.

  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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• 5.

  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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• 6.

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

  • 2
    
  • 1
    
  • 0
    
  • 10
    
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