Important Short and Long Questions Collection – Chemical Bonding and Shape of Molecules

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ChemistryImportant Questions Collection
Unit One: Chemical Bonding and Shape of Molecules
Chemistry | Science Class 12

Short Questions:

  1. Predict the structure of methane based on hybridization. [HSEB 2052]
  2. Identify the hybridization of the indicated atom in each of the following molecules. [HSEB 2053]
    i) Be in BeF2
    ii) B in BF3
    iii) N in NH3
  3. Draw the shapes of sp and sp2 hybrid orbitals. [2056]
  4. How do you predict the molecular geometry of NH3 based on VSEPR model? [HSEB 2057]
  5. Draw the orbital picture of ethyne indicating sigma and pi bond. [HSEB 2058]
  6. Draw the orbital picture of ethene. [HSEB 2059]
  7. How do you interpret that all four C-H bonds of methane are identical. [HSEB 2060]
  8. The bond angle is the central atom in NF3 is 103° where as in BF3 is 120°. What factor accounts for the difference in bond angles? [HSEB 2061]
  9. How do you predict the molecular geometry of NH3 based on VSEPR model? [HSEB 2061]
  10. Define hybridization. Draw the orbital picture of hydrocarbon showing tetrahedral structure. [HSEB 2063]
  11. Predict the mode of hybridization in (i) C of C2H4 (ii) B of BF3. [2065]
  12. What is the mode of hybridization of the central atom whose molecular geometry is tetrahedral? And, give an example of it. [HSEB 2066]
  13. Mention one examples of each. [HSEB 2067]
    i) Tetrahedral hybridization
    ii) Trigonal hybridization
    iii) Diagonal hybridization
  14. Write any two important characters of tetrahedral hybridization. [HSEB 2068]

Long questions:

  1. What do you understand by sp2 hybridization? Using any example explain the molecular geometry involved. [HSEB 2054]
  2. Explain the state of hybridization in ethyne molecule. [HSEB 2055]
  3. Using VSEPR theory, explain the shapes of BeF2 and BF3. [HSEB 2056]
  4. Write short notes on VSEPR theory. [HSEB 2055, 2061]
  5. Why is bond angle in: (a) PH3 is less then NH3 (b) F2O is less than H2O?
  6. Explain the state of hybridization in:
    (i) Ethane molecule
    (ii) Ethene molecule
    (iii) Ethyne molecule
    (iv) Methane molecule

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