Selected MCQ

Current Question
Which compound has highest boiling point?
  • A. CH₄
  • B. NH₃
  • C. H₂O
  • D. HF
Correct Answer: C
Explanation:
Water has extensive hydrogen bonding.
Related Question 1
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 2
Which compound has trigonal planar geometry?
  • A. NH₃
  • B. CH₄
  • C. BF₃
  • D. H₂O
Correct Answer: C
Explanation:
BF₃ is sp² hybridized.
Related Question 3
Which species has highest electronegativity?
  • A. Oxygen
  • B. Fluorine
  • C. Chlorine
  • D. Nitrogen
Correct Answer: B
Explanation:
Fluorine is most electronegative.
Related Question 4
Which compound is most polar?
  • A. CO₂
  • B. CH₄
  • C. NH₃
  • D. BF₃
Correct Answer: C
Explanation:
NH₃ has net dipole moment.
Related Question 5
Which species has highest oxidation state?
  • A. MnO₂
  • B. Mn₂O₇
  • C. MnO
  • D. Mn₃O₄
Correct Answer: B
Explanation:
Mn in Mn₂O₇ is +7.