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Q: In an E1 reaction involving an alkyl halide and a base, the rate of the reaction is
  • A. Linearly depends on the concentration of the alkyl halide only
  • B. Linearly depends on the concentration of both reactants
  • C. Independent of the concentration of the alkyl halide
  • D. Is independent of the concentration of both reactants
Correct Answer: Option A - The elimination reaction E1 from its name, that 1 means its unimolecular reaction E1 consists of two consecutive steps: step 1: Formation of the carbocation. step 2 : Attack of the nucleophile. Since the first step is bond breaking (needs energy) and the second step is bond formation (releases energy), therefore step 1 is the rate determining step (slow step) and therefore, rate of reaction is linearly depends on the concentration of the alkyl halide only.
A. The elimination reaction E1 from its name, that 1 means its unimolecular reaction E1 consists of two consecutive steps: step 1: Formation of the carbocation. step 2 : Attack of the nucleophile. Since the first step is bond breaking (needs energy) and the second step is bond formation (releases energy), therefore step 1 is the rate determining step (slow step) and therefore, rate of reaction is linearly depends on the concentration of the alkyl halide only.

Explanations:

The elimination reaction E1 from its name, that 1 means its unimolecular reaction E1 consists of two consecutive steps: step 1: Formation of the carbocation. step 2 : Attack of the nucleophile. Since the first step is bond breaking (needs energy) and the second step is bond formation (releases energy), therefore step 1 is the rate determining step (slow step) and therefore, rate of reaction is linearly depends on the concentration of the alkyl halide only.