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Chemistry · Oct / Nov 2016 · Paper 11 · Question 27

5070Group VII properties

Which equation shows a reaction that will occur at room temperature and pressure?

  1. ABr2(aq) + 2NaCl(aq) → 2NaBr(aq) + Cl2(aq)
  2. BBr2(aq) + 2NaI(aq) → 2NaBr(aq) + I2(aq)
  3. CI2(aq) + 2NaCl(aq) → 2NaI(aq) + Cl2(aq)
  4. DI2(aq) + 2NaBr(aq) → 2NaI(aq) + Br2(aq)

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Correct answer: B. Br2(aq) + 2NaI(aq) → 2NaBr(aq) + I2(aq)

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