ELITE COMPREHENSIVE
ADVANCED ORGANIC CHEMISTRY EXAM — PAPER 3
SN1 MECHANISM: CARBOCATION STABILITY AND
REARRANGEMENT
Advanced Undergraduate / Honors Organic
Chemistry Level
Spring Examination May 2026
Examination Duration: 3 Hours
Total Marks: 100
GENERAL INSTRUCTIONS
Answer all questions.
All mechanisms must include complete curved-arrow notation.
Clearly indicate stereochemistry, intermediates, and rearrangement pathways.
SECTION A — MULTIPLE CHOICE QUESTIONS
(20 Questions × 2 Marks = 40 Marks)
Select the best answer for each question.
1
Page
, 1.
The defining intermediate in an SN1 reaction is a:
A. Radical
B. Carbene
C. Carbocation
D. Carbanion
2.
The rate law for an SN1 reaction is:
Rate=k[RX]
A. Zero-order
B. First-order overall
C. Second-order overall
D. Third-order overall
3.
Which carbocation is most stable?
A. CH₃⁺
2
Page
B. Primary
ADVANCED ORGANIC CHEMISTRY EXAM — PAPER 3
SN1 MECHANISM: CARBOCATION STABILITY AND
REARRANGEMENT
Advanced Undergraduate / Honors Organic
Chemistry Level
Spring Examination May 2026
Examination Duration: 3 Hours
Total Marks: 100
GENERAL INSTRUCTIONS
Answer all questions.
All mechanisms must include complete curved-arrow notation.
Clearly indicate stereochemistry, intermediates, and rearrangement pathways.
SECTION A — MULTIPLE CHOICE QUESTIONS
(20 Questions × 2 Marks = 40 Marks)
Select the best answer for each question.
1
Page
, 1.
The defining intermediate in an SN1 reaction is a:
A. Radical
B. Carbene
C. Carbocation
D. Carbanion
2.
The rate law for an SN1 reaction is:
Rate=k[RX]
A. Zero-order
B. First-order overall
C. Second-order overall
D. Third-order overall
3.
Which carbocation is most stable?
A. CH₃⁺
2
Page
B. Primary
