Selected MCQ

Current Question
Which compound is most soluble in water?
  • A. Benzene
  • B. NaCl
  • C. CH₄
  • D. CCl₄
Correct Answer: B
Explanation:
Ionic compounds dissolve well.
Related Question 1
Which compound is most polar?
  • A. CO₂
  • B. CH₄
  • C. NH₃
  • D. BF₃
Correct Answer: C
Explanation:
NH₃ has net dipole moment.
Related Question 2
Which gas contributes most to greenhouse effect after water vapor?
  • A. Methane
  • B. CO₂
  • C. Ozone
  • D. Nitrogen
Correct Answer: B
Explanation:
CO₂ is major anthropogenic greenhouse gas.
Related Question 3
Which compound is most acidic?
  • A. Phenol
  • B. Ethanol
  • C. Methane
  • D. Ethene
Correct Answer: A
Explanation:
Phenol stabilizes conjugate base via resonance.
Related Question 4
Which process transports water upward?
  • A. Diffusion
  • B. Osmosis
  • C. Transpiration
  • D. Active transport
Correct Answer: C
Explanation:
Transpiration pull drives ascent.
Related Question 5
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.