AP PGECET Question Paper 2025 (Available): Download Question Paper with Answer Key PDF

AP PGECET 2025 Questions

• 1.

  The absolute humidity of air at 101.325 kPa is measured to be 0.02 kg of water per kg of dry air. Then the partial pressure of water vapour in the air is:
  

  • 1.99 kPa
    
  • 2.55 kPa
    
  • 3.16 kPa
    
  • 3.87 kPa
    
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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.

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

  • 2
    
  • 1
    
  • 0
    
  • 10
    
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• 4.

  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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• 5.

  If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase is known, then the latent heat of fusion can be calculated by the:
  

  • Nernst Heat Theorem
    
  • Maxwell's equation
    
  • Van Laar equation
    
  • Clapeyron–Clausius equation
    
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