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
