O-LevelChemistryMetals & Reactivity5070/11 · May/June 2021 · Q281 Mark

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?

AIt has a higher melting point than potassium.

BIt reacts with water to produce an acidic solution.

CIt reacts with water to produce oxygen gas.

DIt is more reactive than potassium.

✓ Correct answer

D: It is more reactive than potassium.

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Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2021 Paper 1 Variant 1, question 28.

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