CBSE Class 12 Biology Question Paper 2020 with Answer Key (March 14)

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
    
  View Solution

  ---

• 2.

  There are two statements Assertion (A) and Reason (R):
  Assertion (A): At the time of admission of a new partner in a partnership firm, the newly admitted partner brings an agreed amount of capital either in cash or in kind.
  Reason (R): On admission, the new partner gets the right to acquire share in the assets and profits of the partnership firm.
  Choose the correct option from the following:

  • Both Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A).
    
  • Both Assertion (A) and Reason (R) are correct, but Reason (R) is not the correct explanation of Assertion (A).
    
  • Assertion (A) is correct, but Reason (R) is incorrect.
    
  • Assertion (A) is incorrect, but Reason (R) is correct.
    
  View Solution

  ---

• 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)
  View Solution

  ---

• 4.

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

  • Receiving
    
  • Understanding
    
  • Remembering
    
  • Non responding
  View Solution

  ---

• 5.

  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: \[ E^\circ_{\text{Cr}^{3+}/\text{Cr}} = -0.74 \, V, \quad E^\circ_{\text{Fe}^{2+}/\text{Fe}} = -0.44 \, V, \quad \log 10 = 1 \]

  View Solution

  ---

• 6.

  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
    
  View Solution