Chemical Bonding and Molecular Structure – Multiple Choice Questions (MCQs)

1. 25. The bond angle in SF6 is:

   • A. 90°
   • B. 109.5°
   • C. 120°
   • D. 180°

2. 26. Which of the following species is diamagnetic?

   • A. N2
   • B. O2
   • C. B2
   • D. F2

3. 27. The number of lone pairs on the central atom in XeF4 is:

   • A. 2
   • B. 1
   • C. 0
   • D. 3

4. 28. The geometry around the central atom in NH3 is:

   • A. Pyramidal
   • B. Tetrahedral
   • C. Trigonal planar
   • D. Linear

5. 29. Which of the following molecules has a trigonal planar geometry?

   • A. BF3
   • B. NH3
   • C. H2O
   • D. CH4

6. 30. The bond length of C-C bond in benzene is:

   • A. Intermediate between single and double bond
   • B. Same as single bond
   • C. Same as double bond
   • D. Longer than single bond

7. 31. The concept of electrovalency is associated with:

   • A. Ionic bonding
   • B. Covalent bonding
   • C. Metallic bonding
   • D. Hydrogen bonding

8. 32. Sigma bond is formed by:

   • A. Axial overlap of orbitals
   • B. Lateral overlap of orbitals
   • C. Sideways overlap of orbitals
   • D. Perpendicular overlap of orbitals

9. 33. Pi bond is formed by:

   • A. Lateral overlap of orbitals
   • B. Axial overlap of orbitals
   • C. End-to-end overlap of orbitals
   • D. Head-on overlap of orbitals

10. 34. Which of the following has both sigma and pi bonds?

    • A. C2H4
    • B. CH4
    • C. C2H6
    • D. H2

11. 35. The hybrid orbitals have:

    • A. Same energy and shape
    • B. Different energy but same shape
    • C. Same energy but different shape
    • D. Different energy and different shape

12. 36. Overlap of which orbitals leads to the formation of a sigma bond?

    • A. s-s
    • B. s-p
    • C. p-p (axial)
    • D. All of the above