Valence Bond Theory MCQs

41. The bond angle in BF₃ is approximately:

• A) 180°
• B) 120°
• C) 109.5°
• D) 104.5°
• Answer: B

42. Which of the following molecules has sp³ hybridization in its central atom?

• A) CH₄
• B) CO₂
• C) HCl
• D) NO₂
• Answer: A

43. Which molecule has a bond angle of 180°?

• A) H₂O
• B) BF₃
• C) CO₂
• D) NH₃
• Answer: C

44. What is the hybridization of the central atom in XeF₄?

• A) sp³
• B) sp²
• C) sp³d
• D) sp³d²
• Answer: D

45. Valence Bond Theory focuses on:

• A) Atomic orbitals
• B) Molecular orbitals
• C) Hybridized orbitals only
• D) Electronegativity differences
• Answer: A

46. Which molecule has sp² hybridization in its central atom?

• A) CO₂
• B) NH₃
• C) BF₃
• D) CH₄
• Answer: C

47. Which of the following is an example of a molecule with delocalized electrons?

• A) H₂
• B) Benzene
• C) CH₄
• D) HCl
• Answer: B

48. In Valence Bond Theory, the overlapping of which orbitals forms pi bonds?

• A) s-s overlap
• B) s-p overlap
• C) p-p sideways overlap
• D) p-d overlap
• Answer: C

49. Which of the following statements about sigma bonds is true?

• A) They form through side-by-side overlap
• B) They are formed by head-on overlap of orbitals
• C) They are weaker than pi bonds
• D) They form between non-bonding orbitals
• Answer: B

50. In Valence Bond Theory, the unpaired electrons that participate in bonding are located in:

• A) Hybrid orbitals
• B) Unhybridized atomic orbitals
• C) Delocalized molecular orbitals
• D) Core orbitals
• Answer: B

---