CBSE Class 12 Electronics Technology Question Paper 2020 with Answer Key (February 29)

CBSE CLASS XII Questions

• 1.

  Hari, Murari and Abhi were partners in a firm sharing profits and losses in the ratio of 8 : 7 : 4. Murari retired from the firm on 31st March, 2025. Hari and Abhi decided to share profits in the future in the ratio of 2 : 1. The gaining ratio of Hari and Abhi was:

  • 1 : 2
    
  • 8 : 7
    
  • 2 : 1
    
  • 7 : 4
    
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• 2.

  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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• 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.

  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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• 5.

  Arrange the following historical events in chronological order and choose the correct option: I. Champaran Satyagraha
  II. Kheda Satyagraha
  III. Jallianwala Bagh Incident
  IV. Rowlatt Act
  Options:

  • I, II, III, IV
    
  • I, II, IV, III
    
  • II, III, I, IV
    
  • II, IV, III, I
    
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• 6.

  Which of the following is not related to positive attitude?

  • It makes a person happier.
    
  • It helps to build and maintain relationships.
    
  • It decreases one's chances of success.
    
  • It helps to make better decisions.
    
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