Selected MCQ

Current Question
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 1
Which functional group is alcohol?
  • A. -COOH
  • B. -OH
  • C. -NH₂
  • D. -CHO
Correct Answer: B
Explanation:
Alcohols contain hydroxyl group.
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 is an example of nucleophilic substitution?
  • A. Addition to alkene
  • B. SN1 reaction
  • C. Elimination reaction
  • D. Oxidation
Correct Answer: B
Explanation:
SN1 involves nucleophile replacing leaving group.
Related Question 4
Which level of protein structure is most directly stabilized by hydrogen bonds between backbone groups?
  • A. Primary
  • B. Secondary
  • C. Tertiary only
  • D. Quaternary only
Correct Answer: B
Explanation:
(\alpha)-helices and (\beta)-sheets arise from backbone hydrogen bonding patterns.
Related Question 5
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.