CBSE Class 12 Traditional Indian Textiles Question Paper 2020 with Answer Key (February 25)

CBSE CLASS XII Questions

• 1.

  Arrange the following in the correct sequence of their evolution and select the correct option:
  (i) Seaweed
  (ii) Invertebrates
  (iii) Jawless fish
  

  • (i), (ii), (iii)
  • (i), (iii), (ii)
  • (ii), (iii), (i)
  • (ii), (i), (iii)
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• 2.

  Rohan failed an important exam. Instead of accepting that he didn't prepare well, he insists that the teacher was biased and the exam was unfair. Which defence mechanism is Rohan using?
  

  • Repression
    
  • Projection
    
  • Rationalization
    
  • Denial
    
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• 3.

  Calculate emf of the following cell at 298 K: \[ \text{Cr(s)} \, | \, \text{Cr}^{3+} (aq) \, (0.1\, M) \; || \; \text{Fe}^{2+} (aq) \, (0.01\, M) \, | \, \text{Fe(s)} \] Given: \[ E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74 \, V, \quad E^\circ_{\text{Fe}^{2+}/\text{Fe}} = -0.44 \, V, \quad \log 10 = 1 \]

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• 4.

  The energy of an electron in an orbit in hydrogen atom is \( -3.4 \, \text{eV} \). Its angular momentum in the orbit will be:

  • \( \dfrac{3h}{2\pi} \)
    
  • \( \dfrac{2h}{\pi} \)
    
  • \( \dfrac{h}{\pi} \)
    
  • \( \dfrac{h}{2\pi} \)
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• 5.

  Which of the following is not a stage of active listening?
  

  • Receiving
    
  • Understanding
    
  • Non-responding
    
  • Evaluating
    
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• 6.

  The idea of use and disuse of organs for evolution of organism was proposed by
  

  • Charles Darwin
    
  • Thomas Malthus
    
  • Hugo De Vries
    
  • Lamarck
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