AP EAPCET 2026 May 14 Shift 2 Engineering Question Paper with Solution PDF

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• 1.

  If the direction ratios of two lines are given by $ l + m + n = 0 $ and $ mn - 2ln + lm = 0 $, then the angle between the lines is:

  • $ \frac{\pi}{4} $
    
  • $ \frac{\pi}{3} $
    
  • $ \frac{\pi}{2} $
    
  • $ 0 $
    
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• 2.

  The energy of the second bohr orbit of the hydrogen atom is $-328 \text{ kJ mol}^{-1}$; hence the energy of the fourth bohr orbit would be:
  

  • $ -41 \text{ kJ/mol} $
    
  • $ -82 \text{ kJ/mol} $
    
  • $ -164 \text{ kJ/mol} $
    
  • $ -1312 \text{ kJ/mol} $
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• 3.

  Consider the equilibrium reactions:

  

  The equilibrium constant, $K_c$, for the overall dissociation \[ H_3PO_4 \rightleftharpoons 3H^+ + PO_4^{3-} \] is:
  

  • $ \dfrac{K_1}{K_2K_3} $
    
  • $ K_1K_2K_3 $
    
  • $ \dfrac{K_2}{K_1K_3} $
    
  • $ K_1 + K_2 + K_3 $
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• 4.

  If the area of triangle \(ABC\) is \(b^2 - (c - a)^2\), then \(\tan B =\)
  

  • \(1\)
    
  • \(13/15\)
    
  • \(1/4\)
    
  • \(8/15\)
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• 5.

  Identify the correct set of molecules with zero dipole moment:

  • $ \text{CO}_2, \text{NH}_3, \text{H}_2\text{O} $
    
  • $ \text{NH}_3, \text{NF}_3, \text{BF}_3 $
    
  • $ \text{PF}_3, \text{NH}_3, \text{CH}_4 $
    
  • $ \text{CH}_4, \text{BF}_3, \text{CO}_2 $
    
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• 6.

  In a triangle \(\triangle ABC\), if \(a, b,\) and \(c\) are in arithmetic progression, then \(\cos A + 2 \cos B + \cos C =\)
  

  • \(1\)
    
  • \(2\)
    
  • \(3/2\)
    
  • \(\sqrt{3} + 1\)
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