Selected MCQ

Current Question
The major product of complete combustion of an alcohol in excess oxygen is:
  • A. Alkene and water
  • B. Carbon monoxide only
  • C. Carbon dioxide and water
  • D. Aldehyde and hydrogen
Correct Answer: C
Explanation:
Complete oxidation of carbon and hydrogen yields (CO_2) and (H_2O).
Related Question 1
Which gas is essential for combustion?
  • A. CO₂
  • B. O₂
  • C. N₂
  • D. H₂
Correct Answer: B
Explanation:
Oxygen supports burning.
Related Question 2
Which reagent reduces aldehydes to alcohols?
  • A. KMnO₄
  • B. NaBH₄
  • C. HCl
  • D. PCC
Correct Answer: B
Explanation:
Sodium borohydride reduces aldehydes.
Related Question 3
Which blood cells carry oxygen?
  • A. WBC
  • B. RBC
  • C. Platelets
  • D. Plasma
Correct Answer: B
Explanation:
Red blood cells transport oxygen.
Related Question 4
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 5
Which functional group is alcohol?
  • A. -COOH
  • B. -OH
  • C. -NH₂
  • D. -CHO
Correct Answer: B
Explanation:
Alcohols contain hydroxyl group.