Selected MCQ

Current Question
Which compound has the largest bond angle around the central atom?
  • A. NH₃
  • B. H₂O
  • C. CH₄
  • D. BF₃
Correct Answer: D
Explanation:
Trigonal planar BF₃ has 120°, larger than tetrahedral-derived or bent geometries.
Related Question 1
Which bond involves delocalized electrons?
  • A. Ionic
  • B. Covalent
  • C. Metallic
  • D. Hydrogen
Correct Answer: C
Explanation:
Metallic bonding has electron sea.
Related Question 2
Which factor increases acidity of organic compounds?
  • A. Electron donating groups
  • B. Electron withdrawing groups
  • C. Alkyl substitution
  • D. Decreasing electronegativity
Correct Answer: B
Explanation:
Electron-withdrawing stabilizes conjugate base.
Related Question 3
In molecular orbital theory, antibonding orbitals have:
  • A. Lower energy
  • B. Higher energy
  • C. Same energy
  • D. Zero energy
Correct Answer: B
Explanation:
Antibonding orbitals destabilize molecule.
Related Question 4
Which bond is metallic?
  • A. Electron sharing
  • B. Electron transfer
  • C. Electron sea
  • D. Hydrogen bonding
Correct Answer: C
Explanation:
Metallic bonding involves delocalized electrons.
Related Question 5
Which compound has trigonal planar geometry?
  • A. NH₃
  • B. CH₄
  • C. BF₃
  • D. H₂O
Correct Answer: C
Explanation:
BF₃ is sp² hybridized.