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NEET-UG Biology

Valence bond theory and hybridisation — practice questions

3 questions in the bank on this idea. Below are 3 of them, exactly as they appear in a test.

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  1. Question 1 · difficulty L2 · understanding

    The lowest oxidation number of an atom in a compound A2B\mathrm{A}_2 \mathrm{B} is -2 . The number of electrons in its valence shell is _______.

  2. Question 2 · difficulty L2 · understanding

    Match the orbital overlap figures shown in List I with the description given in List II and select the correct answer using the code given below the lists.

    • A. P-2, Q-1, R-3, S-4
    • B. P-4, Q-3, R-1, S-2
    • C. P-2, Q-3, R-1, S-4
    • D. P-4, Q-1, R-3, S-2

  3. Question 3 · difficulty L3 · understanding

     Match List I with List II :  \text { Match List I with List II : } List-I List-II A. C2H4\mathrm{C}_2 \mathrm{H}_4 I. 3σ3 \sigma bonds, 2π2 \pi bonds B. C2H2\mathrm{C}_2 \mathrm{H}_2 II. 3σ3 \sigma bonds, one lone pair C. CH4\mathrm{CH}_4 III. 4σ4 \sigma bonds D. NH3\mathrm{NH}_3 IV. 5σ5 \sigma bonds, 1π1 \pi bond Choose the correct answer from the options given below :

    • A. A-III, B-IV, C-II, D-I
    • B. A-IV, B-I, C-III, D-II
    • C. A-I, B-II, C-IV, D-III
    • D. A-II, B-III, C-I, D-IV

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