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One of the biggest mistakes students make on the DAT is misunderstanding carbocation stability, especially when comparing similar structures.
Many students memorize:
tertiary > secondary > primary
But the DAT tests more than that.
You need to understand what actually stabilizes a carbocation.
Resonance stabilization
Inductive effects
Hyperconjugation
A secondary carbocation with resonance can be more stable than a tertiary carbocation without it.
If you rely only on memorization, these questions become traps.
Focus on why a carbocation is stable, not just the order.
If you’re preparing for the DAT or OAT, the DAT Destroyer and Math Destroyer are the core books used in Dr. Jim Romano’s DAT preparation courses, both online and in person.
DAT Destroyer
DAT Destroyer 2026 — Complete DAT Science Prep System | Dr. Jim Romano
Math Destroyer
2026 Math Destroyer – DAT and OAT Quantitative Reasoning Prep
Free DAT resources
Start Your DAT and OAT Preparation for Free | Official Resources from
Many students memorize:
tertiary > secondary > primary
But the DAT tests more than that.
You need to understand what actually stabilizes a carbocation.
Resonance stabilization
Inductive effects
Hyperconjugation
A secondary carbocation with resonance can be more stable than a tertiary carbocation without it.
If you rely only on memorization, these questions become traps.
Focus on why a carbocation is stable, not just the order.
If you’re preparing for the DAT or OAT, the DAT Destroyer and Math Destroyer are the core books used in Dr. Jim Romano’s DAT preparation courses, both online and in person.
DAT Destroyer
DAT Destroyer 2026 — Complete DAT Science Prep System | Dr. Jim Romano
Math Destroyer
2026 Math Destroyer – DAT and OAT Quantitative Reasoning Prep
Free DAT resources
Start Your DAT and OAT Preparation for Free | Official Resources from
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