Answer: Bromoethane.
- A Methyl bromide
- B Bromoethane
- C Ethyl bromide
- D 1-bromoethane
Correct answer: B. Bromoethane
Explanation: IUPAC names locate the halogen as a substituent on the parent chain: CH₃CH₂Br is bromoethane.
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.