Optical isomerism (A-level only)

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Question 6
Medium

Which of the following organic reactions does not produce a racemic mixture?

Electrophilic addition of HBr\text{HBr}HBr to propene

Electrophilic addition of HBr\text{HBr}HBr to but-1-ene

Nucleophilic addition of HCN\text{HCN}HCN to butanal

Electrophilic addition of HBr\text{HBr}HBr to trans\textit{trans}trans-hex-3-ene

Optical isomerism (A-level only) Questions

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