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Which reaction involves addition-elimination? A (C₃H₇)Br + KOH → C₄H₉CH₂ + KBr + H₂O B CH₃COCl + C₂H₅OH → CH₃COOCH₂H₅ + HCl C CH₂=CH–CH₂ + Cl₂ → CH₂CHClCH₂Cl D CH₃CH₂CH(Br) + NaOH → CH₃CH₂CH(OH) + NaBr - AQA - A-Level Chemistry - Question 27 - 2020 - Paper 3
Question 27
Which reaction involves addition-elimination? A (C₃H₇)Br + KOH → C₄H₉CH₂ + KBr + H₂O B CH₃COCl + C₂H₅OH → CH₃COOCH₂H₅ + HCl C CH₂=CH–CH₂ + Cl₂ → CH₂CHClCH₂Cl ... show full transcript
Worked Solution & Example Answer:Which reaction involves addition-elimination? A (C₃H₇)Br + KOH → C₄H₉CH₂ + KBr + H₂O B CH₃COCl + C₂H₅OH → CH₃COOCH₂H₅ + HCl C CH₂=CH–CH₂ + Cl₂ → CH₂CHClCH₂Cl D CH₃CH₂CH(Br) + NaOH → CH₃CH₂CH(OH) + NaBr - AQA - A-Level Chemistry - Question 27 - 2020 - Paper 3
Step 1
Which reaction involves addition-elimination?
Answer
The correct answer is B. In the reaction B, acetyl chloride reacts with ethanol to form ethyl acetate and hydrochloric acid. This transformation incorporates an addition-elimination mechanism, where the nucleophile (ethanol) adds to the carbonyl carbon of acetyl chloride, followed by elimination of HCl.