CBSE Class 12 Air-Conditioning & Refrigeration Question Paper 2022 with Answer Key (June 9, Set 4- Morning Session)

CBSE CLASS XII Questions

• 1.

  The rate for the following reaction is given by: \[ A + B \rightarrow C, \quad \text{Rate} = k[A][B]^2 \] How is the rate affected if we double the concentration of B?

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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.

  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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• 4.

  From the following information obtained from the books of 'Ajanta Ltd.', calculate Cash from Operations: Net Profit for the year ended 31st March, 2025 after charging depreciation of ₹ 80,000 and after writing off goodwill ₹ 10,500 was ₹ 4,90,000. Additional Information:

  

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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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