Selected MCQ

Current Question
Which molecule has highest dipole moment?
  • A. CO₂
  • B. NH₃
  • C. CH₄
  • D. BF₃
Correct Answer: B
Explanation:
NH₃ is polar with lone pair.
Related Question 1
Which molecule exhibits dipole moment?
  • A. CO₂
  • B. BF₃
  • C. NH₃
  • D. CH₄
Correct Answer: C
Explanation:
NH₃ is polar due to lone pair.
Related Question 2
Which molecule carries oxygen in muscle?
  • A. Hemoglobin
  • B. Myoglobin
  • C. Collagen
  • D. Keratin
Correct Answer: B
Explanation:
Myoglobin stores oxygen in muscle.
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 phenomenon demonstrates quantization of angular momentum?
  • A. Diffraction
  • B. Zeeman effect
  • C. Photoelectric effect
  • D. Reflection
Correct Answer: B
Explanation:
Zeeman splitting arises from quantized angular momentum states.
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.