Selected MCQ

Current Question
Which base is strong?
  • A. NH₃
  • B. NaOH
  • C. CH₃COOH
  • D. H₂O
Correct Answer: B
Explanation:
NaOH fully dissociates.
Related Question 1
Which compound is strongest base?
  • A. NH₃
  • B. OH⁻
  • C. CH₃COO⁻
  • D. Cl⁻
Correct Answer: B
Explanation:
Hydroxide is strong base in water.
Related Question 2
Which base turns red litmus blue?
  • A. Acid
  • B. Base
  • C. Neutral
  • D. Salt
Correct Answer: B
Explanation:
Bases change litmus color.
Related Question 3
Which force is strongest?
  • A. Gravitational
  • B. Electromagnetic
  • C. Weak
  • D. Strong
Correct Answer: D
Explanation:
Strong force binds nucleons.
Related Question 4
Which acid is strongest in water?
  • A. HF
  • B. HClO₄
  • C. H₂CO₃
  • D. CH₃COOH
Correct Answer: B
Explanation:
Perchloric acid fully dissociates.
Related Question 5
Which acid is strong?
  • A. CH₃COOH
  • B. HCl
  • C. H₂CO₃
  • D. HF
Correct Answer: B
Explanation:
HCl fully ionizes.