CBSE Class 12 Office Procedures And Practices Question Paper 2020 with Answer Key (February 25)

CBSE CLASS XII Questions

• 1.

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

  • Receiving
    
  • Understanding
    
  • Remembering
    
  • Non responding
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• 2.

  In an economy, when __________ is insufficient to achieve the level of output corresponding to the full employment, the difference is termed a deflationary gap. 
   

  • ex-ante Aggregate Demand
    
  • ex-post Aggregate Demand
    
  • ex-ante Aggregate Supply
    
  • ex-post Aggregate Supply
    
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• 3.

  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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• 4.

  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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• 5.

  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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• 6.

  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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