CBSE Class 10 Science Question Paper 2016 with Answer Key (March 2, Set 3- 31/2/3)

CBSE X Questions

• 1.

  The graph of \(y = f(x)\) is given. The number of zeroes of \(f(x)\) is :
  

  

  • 0
    
  • 1
    
  • 3
    
  • 2
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• 2.

  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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• 3.

  (a) Why did many Europeans migrate to America after the sixteenth century? Explain. OR (b) How did trade and long distance travel contribute to the spread of diseases during the ancient period? Explain.

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• 4.

  Paddy fields require a large amount of water. The pesticides and chemical fertilizers used are washed down into the soil or waterbodies. How do these chemicals reach our bodies? What is this phenomenon known as?

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• 5.

  Which structure in a leaf is mainly responsible for gaseous exchange?

  • Xylem
    
  • Stomata
    
  • Phloem
    
  • Cuticle
    
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• 6.

  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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