Assess students' ability to analyze and assign reaction mechanisms (SN1, SN2, E1, E2) from experimental evidence—rate laws and kinetic order, solvent polarity/proticity, nucleophile/base strength, substrate structure and leaving group, temperature, and stereochemical outcomes. Require prediction of major products and stereochemistry, mechanistic justification (carbocation stability, anti‑periplanar E2 geometry, rearrangements), and design of discriminating experiments.