Selected MCQ

Current Question
Which amino acid is acidic?
  • A. Lysine
  • B. Arginine
  • C. Aspartic acid
  • D. Alanine
Correct Answer: C
Explanation:
Aspartic acid has acidic side chain.
Related Question 1
Which molecule carries amino acids?
  • A. mRNA
  • B. rRNA
  • C. tRNA
  • D. DNA
Correct Answer: C
Explanation:
tRNA transports amino acids.
Related Question 2
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 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 acid is strongest in water?
  • A. HF
  • B. HClO₄
  • C. H₂CO₃
  • D. CH₃COOH
Correct Answer: B
Explanation:
Perchloric acid fully dissociates.