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The rate of E1 reaction depends upon______________________?

Correct answer: A. the concentration of substrate

  • A. the concentration of substrate
  • B. the concentration of nucleophile
  • C. the concentration of substrate as well as nucleophile
  • D. base the concentration of substrate as well as nucleophile

Explanation

In an E1 reaction, the slow rate-determining step is ionisation of the substrate to form a carbocation, so rate = k[substrate]. Students may choose the option involving the nucleophile or base because they assume every reagent shown in the reaction must affect the rate-determining step.

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About Elimination Reactions

Elimination reactions remove a leaving group and a hydrogen atom from adjacent carbon atoms to form an alkene. The topic covers dehydrohalogenation of alkyl halides, E1 and E2 mechanisms, the role of base, solvent and substrate structure, and Zaitsev orientation, which is often contrasted with substitution.

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