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Chemistry · May / June 2021 · Paper 11 · Question 28

5070Group I properties

The elements in Group I of the Periodic Table show trends in both their reactivities and their melting points. Rubidium is in Group I. Which statement about rubidium is correct?

  1. AIt has a higher melting point than potassium.
  2. BIt reacts with water to produce an acidic solution.
  3. CIt reacts with water to produce oxygen gas.
  4. DIt is more reactive than potassium.

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Correct answer: D. It is more reactive than potassium.

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