Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

Two reactions are given. 1. 2-bromo-2-methylbutane is heated with $\text{NaOH(aq)}$ 2. 2-chloro-2-methylbutane is heated with $\text{NaOH(aq)}$ The conditions are identical in both reactions, and $\text{NaOH(aq)}$ is present in excess. From $30.18\,\text{g}$ of 2-bromo-2-methylbutane, $12.32\,\text{g}$ of product X is produced. [$M_r$: 2-bromo-2-methylbutane, $150.9$; 2-chloro-2-methylbutane, $106.5$] Which row is the correct one?

  • Apercentage yield 41; 1 is faster than 2
  • Bpercentage yield 41; 2 is faster than 1
  • Cpercentage yield 70; 1 is faster than 2
  • Dpercentage yield 70; 2 is faster than 1

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