Answer: Quadruples.
- A Doubles
- B Quadruples
- C Remains the same
- D Increases 8-fold
Correct answer: B. Quadruples
Explanation: Rate = k[RX][Nu]. Doubling both concentrations: Rate = k(2[RX])(2[Nu]) = 4k[RX][Nu]. The rate increases 4 times (quadruples).
SN2 proceeds in a single step with backside attack and inversion of configuration, while SN1 forms a planar carbocation intermediate first, leading to racemisation.
Concept context
Study carbon-halogen compounds: how they are made, how they react via SN1/SN2 and elimination, their stereochemistry, and their environmental impact.