Selected MCQ

Current Question
Which functional group is alcohol?
  • A. -COOH
  • B. -OH
  • C. -NH₂
  • D. -CHO
Correct Answer: B
Explanation:
Alcohols contain hydroxyl group.
Related Question 1
Which functional group is most reactive in nucleophilic substitution?
  • A. Alkane
  • B. Alkyl halide
  • C. Alkene
  • D. Aromatic ring
Correct Answer: B
Explanation:
Leaving group facilitates substitution.
Related Question 2
Which functional group defines ketones?
  • A. -CHO
  • B. -CO-
  • C. -COOH
  • D. -OH
Correct Answer: B
Explanation:
Ketones contain carbonyl group within chain.
Related Question 3
Which functional group is present in an ester?
  • A. (-COOH)
  • B. (-COOR)
  • C. (-CHO)
  • D. (-CONH_2)
Correct Answer: B
Explanation:
Esters contain an acyl group bonded to an alkoxy oxygen.
Related Question 4
Which reagent reduces aldehydes to alcohols?
  • A. KMnO₄
  • B. NaBH₄
  • C. HCl
  • D. PCC
Correct Answer: B
Explanation:
Sodium borohydride reduces aldehydes.
Related Question 5
Which reagent oxidizes alcohol to aldehyde?
  • A. KMnO₄
  • B. PCC
  • C. NaOH
  • D. HCl
Correct Answer: B
Explanation:
PCC stops oxidation at aldehyde stage.