O-LevelChemistryMetals & Reactivity5070/12 · Oct/Nov 2023 · Q271 Mark

A small piece of metal is added to a large beaker of water. A vigorous reaction occurs. When the reaction stops, a few drops of litmus are added to the solution. What is the metal and which colour is the solution after the litmus is added?

Acalcium, blue

Bcalcium, red

Cmagnesium, blue

Dmagnesium, red

✓ Correct answer

A: calcium, blue

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Topic: Metals & Reactivity, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2023 Paper 1 Variant 2, question 27.

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