Selected MCQ

Current Question
Which acid is strong?
  • A. CH₃COOH
  • B. HCl
  • C. H₂CO₃
  • D. HF
Correct Answer: B
Explanation:
HCl fully ionizes.
Related Question 1
Which acid is strongest in water?
  • A. HF
  • B. HClO₄
  • C. H₂CO₃
  • D. CH₃COOH
Correct Answer: B
Explanation:
Perchloric acid fully dissociates.
Related Question 2
Which base is strong?
  • A. NH₃
  • B. NaOH
  • C. CH₃COOH
  • D. H₂O
Correct Answer: B
Explanation:
NaOH fully dissociates.
Related Question 3
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 4
Which acid is diprotic?
  • A. HCl
  • B. H₂SO₄
  • C. HNO₃
  • D. HF
Correct Answer: B
Explanation:
Sulfuric acid donates two protons.
Related Question 5
Which force is strongest?
  • A. Gravitational
  • B. Electromagnetic
  • C. Weak
  • D. Strong
Correct Answer: D
Explanation:
Strong force binds nucleons.