CBSE Class 10 Urdu B Question Paper 2023 with Answer Key (February 24, Set 4- 5B)

CBSE X Questions

• 1.

  In the given figure, \(AB \parallel DE\) and \(AC \parallel DF\). Show that \(\triangle ABC \sim \triangle DEF\). If \(BC = 10\) cm, \(EB = CF = 5\) cm and \(AB = 7\) cm, then find the length DE.
  

  

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• 2.

  Assertion : In human beings, the respiratory pigment is haemoglobin present in red blood cells.
  Reason (R) : Haemoglobin has a very high affinity for carbon dioxide.
  

  • Both, Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
    
  • Both, Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
    
  • Assertion (A) is true, but Reason (R) is false.
    
  • Assertion (A) is false, but Reason (R) is true.
    
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• 3.

  Show the formation of ionic compound CaO with electron dot structure.

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• 4.

  In triangles ABC and PQR, \( \angle A = \angle Q \) and \( \angle B = \angle R \), then \( AB : AC \) is equal to :
  

  • \( PQ : PR \)
    
  • \( PQ : QR \)
    
  • \( QR : QP \)
    
  • \( PR : QR \)
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• 5.

  Prove that \(2 + 3\sqrt{5}\) is an irrational number given that \(\sqrt{5}\) is an irrational number.
  

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• 6.

  Prove that: \(\frac{\sec^3 \theta}{\sec^2 \theta - 1} + \frac{\csc^3 \theta}{\csc^2 \theta - 1} = \sec \theta \cdot \csc \theta (\sec \theta + \csc \theta)\)
  

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